Why is it bad to have two anti-virus systems?What happens if you install an antivirus program with another...
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Why is it bad to have two anti-virus systems?
What happens if you install an antivirus program with another already installed?Advancements in Anti-Virus technologyAnti-Bad activity protectionIS the advice about Windows Security Essentials accurate on this site?Is it bad for the computer to have an anti-spyware and a separate anti-virus at the same time?How do I restore a quarantined object in Kaspersky Anti-Virus 2012?How far should one go to protect his PC?Fastest Anti-Virus for gamingFully manual virus scans on Windows 10Is it necessary to install anti-ransomware when you already have anti-virus + anti-exploit?Issue: Two Anti Virus Conflicting Caused Restart Loop in Computer
Why is it bad to have two anti-virus systems? It could be useful to get better detection rates. In the second post from the top of the page Stranger claims it's not bad to use two antiviruses as long as they don't conflict. How do you know if a-v's don't conflict?
anti-virus
edited Aug 5 '12 at 17:22
Der Hochstapler
68.2k50230286
asked Jun 18 '12 at 7:50
CeleritasCeleritas
3,9962283133
add a comment |
Why is it bad to have two anti-virus systems? It could be useful to get better detection rates. In the second post from the top of the page Stranger claims it's not bad to use two antiviruses as long as they don't conflict. How do you know if a-v's don't conflict?
anti-virus
edited Aug 5 '12 at 17:22
Der Hochstapler
68.2k50230286
asked Jun 18 '12 at 7:50
CeleritasCeleritas
3,9962283133
3
So you have found one place that carefully says that having 2 AV's might not be bad. But you disregard all the other sources that claims it is bound to cause problems?
– Nifle
Jun 18 '12 at 7:54
1
No one's ever given me reasons to believe 2 AV's are bad.
– Celeritas
Jun 18 '12 at 18:34
1
Antivirus buries itself so deeply in the OS anymore that eventually the two packages will get in a turf war, have a rather intense knife fight and your computer as the innocent bystander will end up in the computer Hospital ER bleeding its bits out. The Cold War comes back with full nukes if you ever get McAfee and Kaspersky to install in tandem... That's why they always check on install for incompatible security software anymore and prompt you to remove one.
– Fiasco Labs
Aug 27 '14 at 3:58
add a comment |
Why is it bad to have two anti-virus systems? It could be useful to get better detection rates. In the second post from the top of the page Stranger claims it's not bad to use two antiviruses as long as they don't conflict. How do you know if a-v's don't conflict?
anti-virus
edited Aug 5 '12 at 17:22
Der Hochstapler
68.2k50230286
asked Jun 18 '12 at 7:50
CeleritasCeleritas
3,9962283133
Why is it bad to have two anti-virus systems? It could be useful to get better detection rates. In the second post from the top of the page Stranger claims it's not bad to use two antiviruses as long as they don't conflict. How do you know if a-v's don't conflict?
anti-virus
anti-virus
edited Aug 5 '12 at 17:22
Der Hochstapler
68.2k50230286
asked Jun 18 '12 at 7:50
CeleritasCeleritas
3,9962283133
edited Aug 5 '12 at 17:22
Der Hochstapler
68.2k50230286
asked Jun 18 '12 at 7:50
CeleritasCeleritas
3,9962283133
edited Aug 5 '12 at 17:22
Der Hochstapler
68.2k50230286
edited Aug 5 '12 at 17:22
Der Hochstapler
68.2k50230286
edited Aug 5 '12 at 17:22
Der Hochstapler
68.2k50230286
68.2k50230286
asked Jun 18 '12 at 7:50
CeleritasCeleritas
3,9962283133
asked Jun 18 '12 at 7:50
CeleritasCeleritas
3,9962283133
asked Jun 18 '12 at 7:50
CeleritasCeleritas
3,9962283133
3,9962283133
3
So you have found one place that carefully says that having 2 AV's might not be bad. But you disregard all the other sources that claims it is bound to cause problems?
– Nifle
Jun 18 '12 at 7:54
1
No one's ever given me reasons to believe 2 AV's are bad.
– Celeritas
Jun 18 '12 at 18:34
1
Antivirus buries itself so deeply in the OS anymore that eventually the two packages will get in a turf war, have a rather intense knife fight and your computer as the innocent bystander will end up in the computer Hospital ER bleeding its bits out. The Cold War comes back with full nukes if you ever get McAfee and Kaspersky to install in tandem... That's why they always check on install for incompatible security software anymore and prompt you to remove one.
– Fiasco Labs
Aug 27 '14 at 3:58
add a comment |
3
So you have found one place that carefully says that having 2 AV's might not be bad. But you disregard all the other sources that claims it is bound to cause problems?
– Nifle
Jun 18 '12 at 7:54
1
No one's ever given me reasons to believe 2 AV's are bad.
– Celeritas
Jun 18 '12 at 18:34
1
Antivirus buries itself so deeply in the OS anymore that eventually the two packages will get in a turf war, have a rather intense knife fight and your computer as the innocent bystander will end up in the computer Hospital ER bleeding its bits out. The Cold War comes back with full nukes if you ever get McAfee and Kaspersky to install in tandem... That's why they always check on install for incompatible security software anymore and prompt you to remove one.
– Fiasco Labs
Aug 27 '14 at 3:58
3
3
So you have found one place that carefully says that having 2 AV's might not be bad. But you disregard all the other sources that claims it is bound to cause problems?
– Nifle
Jun 18 '12 at 7:54
So you have found one place that carefully says that having 2 AV's might not be bad. But you disregard all the other sources that claims it is bound to cause problems?
– Nifle
Jun 18 '12 at 7:54
1
1
No one's ever given me reasons to believe 2 AV's are bad.
– Celeritas
Jun 18 '12 at 18:34
No one's ever given me reasons to believe 2 AV's are bad.
– Celeritas
Jun 18 '12 at 18:34
1
1
Antivirus buries itself so deeply in the OS anymore that eventually the two packages will get in a turf war, have a rather intense knife fight and your computer as the innocent bystander will end up in the computer Hospital ER bleeding its bits out. The Cold War comes back with full nukes if you ever get McAfee and Kaspersky to install in tandem... That's why they always check on install for incompatible security software anymore and prompt you to remove one.
– Fiasco Labs
Aug 27 '14 at 3:58
Antivirus buries itself so deeply in the OS anymore that eventually the two packages will get in a turf war, have a rather intense knife fight and your computer as the innocent bystander will end up in the computer Hospital ER bleeding its bits out. The Cold War comes back with full nukes if you ever get McAfee and Kaspersky to install in tandem... That's why they always check on install for incompatible security software anymore and prompt you to remove one.
– Fiasco Labs
Aug 27 '14 at 3:58
add a comment |
2 Answers
2
active
oldest
votes
Two active scanning anti-virus programs will conflict. Passive scanners won't, and you can have as many of them as you want.
The issue is the way active scanners work. The behavior they're looking for is programs that attempt to manage the entire system and intercept and mangle the data going to other programs. However, they prevent this behavior by engaging in precisely this behavior. To an anti-virus program, another anti-virus program behaves precisely as a virus does -- monitoring other programs, intercepting and filtering their data, and so on.
If either anti-virus program allowed information to get to a process without scanning it, it wouldn't be doing its job. But they can't both scan the data (since whichever wasn't last would have scanned the data that went to the other anti-virus program, not the data that went to the target process). So there is no sane resolution.
answered Jun 18 '12 at 7:57
David SchwartzDavid Schwartz
56.9k686130
1
And the end result of this is that everything slows to a standstill as a fileopen activity in one triggers a fileopen for scanning in the other and so on.
– Rory Alsop
Jun 18 '12 at 8:09
1
It can also just deadlock. A program opens a file. Antivirus one stalls the open until it can scan the file. Antivirus one then opens the file to scan it. Antivirus two stalls antivirus one's open until it can scan it. Then antivirus two goes to open the file to scan it. Antivirus one stalls the open until its scan can complete. But it can't make progress because antivirus two stalled its open. Now each antivirus program is waiting for the other to complete its scan so that it can begin its scan. Oops.
– David Schwartz
Jun 18 '12 at 8:23
Does that mean it's bad to have an anti-virus and an anti-malware? For example Norton AV and Malwarebytes?
– Celeritas
Jun 18 '12 at 18:37
1
@Celeritas: If they're both active scanners that run all the time and monitor network or disk access, then yes. (This is why I only recommend the free version of Malwarebytes, which is a passive scanner. It's not good enough to be your active scanner, and you can only run one active scanner. But it's a great passive scanner.)
– David Schwartz
Jun 18 '12 at 19:03
add a comment |
It is highly recommended to stack as much anti-virus as possible. For my part I install :
- Comodo Free Antivirus.
- Avira Free Antivirus.
- Avast Free Antivirus.
- AVG Free Antivirus.
- Kaspersky Lab Internet Security.
- Bitdefender Antivirus Free Edition.
- Sophos Home Free Antivirus.
- Microsoft Windows Defender.
Of course, this is on top of Norton ;)
For more info, you can refer to this video :
https://www.youtube.com/watch?v=dQw4w9WgXcQ
answered 5 mins ago
Zouya BilouniZouya Bilouni
1
New contributor
Zouya Bilouni is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
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oldest
votes
Two active scanning anti-virus programs will conflict. Passive scanners won't, and you can have as many of them as you want.
The issue is the way active scanners work. The behavior they're looking for is programs that attempt to manage the entire system and intercept and mangle the data going to other programs. However, they prevent this behavior by engaging in precisely this behavior. To an anti-virus program, another anti-virus program behaves precisely as a virus does -- monitoring other programs, intercepting and filtering their data, and so on.
If either anti-virus program allowed information to get to a process without scanning it, it wouldn't be doing its job. But they can't both scan the data (since whichever wasn't last would have scanned the data that went to the other anti-virus program, not the data that went to the target process). So there is no sane resolution.
answered Jun 18 '12 at 7:57
David SchwartzDavid Schwartz
56.9k686130
1
And the end result of this is that everything slows to a standstill as a fileopen activity in one triggers a fileopen for scanning in the other and so on.
– Rory Alsop
Jun 18 '12 at 8:09
1
It can also just deadlock. A program opens a file. Antivirus one stalls the open until it can scan the file. Antivirus one then opens the file to scan it. Antivirus two stalls antivirus one's open until it can scan it. Then antivirus two goes to open the file to scan it. Antivirus one stalls the open until its scan can complete. But it can't make progress because antivirus two stalled its open. Now each antivirus program is waiting for the other to complete its scan so that it can begin its scan. Oops.
– David Schwartz
Jun 18 '12 at 8:23
Does that mean it's bad to have an anti-virus and an anti-malware? For example Norton AV and Malwarebytes?
– Celeritas
Jun 18 '12 at 18:37
1
@Celeritas: If they're both active scanners that run all the time and monitor network or disk access, then yes. (This is why I only recommend the free version of Malwarebytes, which is a passive scanner. It's not good enough to be your active scanner, and you can only run one active scanner. But it's a great passive scanner.)
– David Schwartz
Jun 18 '12 at 19:03
add a comment |
Two active scanning anti-virus programs will conflict. Passive scanners won't, and you can have as many of them as you want.
The issue is the way active scanners work. The behavior they're looking for is programs that attempt to manage the entire system and intercept and mangle the data going to other programs. However, they prevent this behavior by engaging in precisely this behavior. To an anti-virus program, another anti-virus program behaves precisely as a virus does -- monitoring other programs, intercepting and filtering their data, and so on.
If either anti-virus program allowed information to get to a process without scanning it, it wouldn't be doing its job. But they can't both scan the data (since whichever wasn't last would have scanned the data that went to the other anti-virus program, not the data that went to the target process). So there is no sane resolution.
answered Jun 18 '12 at 7:57
David SchwartzDavid Schwartz
56.9k686130
1
And the end result of this is that everything slows to a standstill as a fileopen activity in one triggers a fileopen for scanning in the other and so on.
– Rory Alsop
Jun 18 '12 at 8:09
1
It can also just deadlock. A program opens a file. Antivirus one stalls the open until it can scan the file. Antivirus one then opens the file to scan it. Antivirus two stalls antivirus one's open until it can scan it. Then antivirus two goes to open the file to scan it. Antivirus one stalls the open until its scan can complete. But it can't make progress because antivirus two stalled its open. Now each antivirus program is waiting for the other to complete its scan so that it can begin its scan. Oops.
– David Schwartz
Jun 18 '12 at 8:23
Does that mean it's bad to have an anti-virus and an anti-malware? For example Norton AV and Malwarebytes?
– Celeritas
Jun 18 '12 at 18:37
1
@Celeritas: If they're both active scanners that run all the time and monitor network or disk access, then yes. (This is why I only recommend the free version of Malwarebytes, which is a passive scanner. It's not good enough to be your active scanner, and you can only run one active scanner. But it's a great passive scanner.)
– David Schwartz
Jun 18 '12 at 19:03
add a comment |
Two active scanning anti-virus programs will conflict. Passive scanners won't, and you can have as many of them as you want.
The issue is the way active scanners work. The behavior they're looking for is programs that attempt to manage the entire system and intercept and mangle the data going to other programs. However, they prevent this behavior by engaging in precisely this behavior. To an anti-virus program, another anti-virus program behaves precisely as a virus does -- monitoring other programs, intercepting and filtering their data, and so on.
If either anti-virus program allowed information to get to a process without scanning it, it wouldn't be doing its job. But they can't both scan the data (since whichever wasn't last would have scanned the data that went to the other anti-virus program, not the data that went to the target process). So there is no sane resolution.
answered Jun 18 '12 at 7:57
David SchwartzDavid Schwartz
56.9k686130
Two active scanning anti-virus programs will conflict. Passive scanners won't, and you can have as many of them as you want.
The issue is the way active scanners work. The behavior they're looking for is programs that attempt to manage the entire system and intercept and mangle the data going to other programs. However, they prevent this behavior by engaging in precisely this behavior. To an anti-virus program, another anti-virus program behaves precisely as a virus does -- monitoring other programs, intercepting and filtering their data, and so on.
If either anti-virus program allowed information to get to a process without scanning it, it wouldn't be doing its job. But they can't both scan the data (since whichever wasn't last would have scanned the data that went to the other anti-virus program, not the data that went to the target process). So there is no sane resolution.
answered Jun 18 '12 at 7:57
David SchwartzDavid Schwartz
56.9k686130
answered Jun 18 '12 at 7:57
David SchwartzDavid Schwartz
56.9k686130
answered Jun 18 '12 at 7:57
David SchwartzDavid Schwartz
56.9k686130
answered Jun 18 '12 at 7:57
David SchwartzDavid Schwartz
56.9k686130
56.9k686130
1
And the end result of this is that everything slows to a standstill as a fileopen activity in one triggers a fileopen for scanning in the other and so on.
– Rory Alsop
Jun 18 '12 at 8:09
1
It can also just deadlock. A program opens a file. Antivirus one stalls the open until it can scan the file. Antivirus one then opens the file to scan it. Antivirus two stalls antivirus one's open until it can scan it. Then antivirus two goes to open the file to scan it. Antivirus one stalls the open until its scan can complete. But it can't make progress because antivirus two stalled its open. Now each antivirus program is waiting for the other to complete its scan so that it can begin its scan. Oops.
– David Schwartz
Jun 18 '12 at 8:23
Does that mean it's bad to have an anti-virus and an anti-malware? For example Norton AV and Malwarebytes?
– Celeritas
Jun 18 '12 at 18:37
1
@Celeritas: If they're both active scanners that run all the time and monitor network or disk access, then yes. (This is why I only recommend the free version of Malwarebytes, which is a passive scanner. It's not good enough to be your active scanner, and you can only run one active scanner. But it's a great passive scanner.)
– David Schwartz
Jun 18 '12 at 19:03
add a comment |
1
And the end result of this is that everything slows to a standstill as a fileopen activity in one triggers a fileopen for scanning in the other and so on.
– Rory Alsop
Jun 18 '12 at 8:09
1
It can also just deadlock. A program opens a file. Antivirus one stalls the open until it can scan the file. Antivirus one then opens the file to scan it. Antivirus two stalls antivirus one's open until it can scan it. Then antivirus two goes to open the file to scan it. Antivirus one stalls the open until its scan can complete. But it can't make progress because antivirus two stalled its open. Now each antivirus program is waiting for the other to complete its scan so that it can begin its scan. Oops.
– David Schwartz
Jun 18 '12 at 8:23
Does that mean it's bad to have an anti-virus and an anti-malware? For example Norton AV and Malwarebytes?
– Celeritas
Jun 18 '12 at 18:37
1
@Celeritas: If they're both active scanners that run all the time and monitor network or disk access, then yes. (This is why I only recommend the free version of Malwarebytes, which is a passive scanner. It's not good enough to be your active scanner, and you can only run one active scanner. But it's a great passive scanner.)
– David Schwartz
Jun 18 '12 at 19:03
1
1
And the end result of this is that everything slows to a standstill as a fileopen activity in one triggers a fileopen for scanning in the other and so on.
– Rory Alsop
Jun 18 '12 at 8:09
And the end result of this is that everything slows to a standstill as a fileopen activity in one triggers a fileopen for scanning in the other and so on.
– Rory Alsop
Jun 18 '12 at 8:09
1
1
It can also just deadlock. A program opens a file. Antivirus one stalls the open until it can scan the file. Antivirus one then opens the file to scan it. Antivirus two stalls antivirus one's open until it can scan it. Then antivirus two goes to open the file to scan it. Antivirus one stalls the open until its scan can complete. But it can't make progress because antivirus two stalled its open. Now each antivirus program is waiting for the other to complete its scan so that it can begin its scan. Oops.
– David Schwartz
Jun 18 '12 at 8:23
It can also just deadlock. A program opens a file. Antivirus one stalls the open until it can scan the file. Antivirus one then opens the file to scan it. Antivirus two stalls antivirus one's open until it can scan it. Then antivirus two goes to open the file to scan it. Antivirus one stalls the open until its scan can complete. But it can't make progress because antivirus two stalled its open. Now each antivirus program is waiting for the other to complete its scan so that it can begin its scan. Oops.
– David Schwartz
Jun 18 '12 at 8:23
Does that mean it's bad to have an anti-virus and an anti-malware? For example Norton AV and Malwarebytes?
– Celeritas
Jun 18 '12 at 18:37
Does that mean it's bad to have an anti-virus and an anti-malware? For example Norton AV and Malwarebytes?
– Celeritas
Jun 18 '12 at 18:37
1
1
@Celeritas: If they're both active scanners that run all the time and monitor network or disk access, then yes. (This is why I only recommend the free version of Malwarebytes, which is a passive scanner. It's not good enough to be your active scanner, and you can only run one active scanner. But it's a great passive scanner.)
– David Schwartz
Jun 18 '12 at 19:03
@Celeritas: If they're both active scanners that run all the time and monitor network or disk access, then yes. (This is why I only recommend the free version of Malwarebytes, which is a passive scanner. It's not good enough to be your active scanner, and you can only run one active scanner. But it's a great passive scanner.)
– David Schwartz
Jun 18 '12 at 19:03
add a comment |
It is highly recommended to stack as much anti-virus as possible. For my part I install :
- Comodo Free Antivirus.
- Avira Free Antivirus.
- Avast Free Antivirus.
- AVG Free Antivirus.
- Kaspersky Lab Internet Security.
- Bitdefender Antivirus Free Edition.
- Sophos Home Free Antivirus.
- Microsoft Windows Defender.
Of course, this is on top of Norton ;)
For more info, you can refer to this video :
https://www.youtube.com/watch?v=dQw4w9WgXcQ
answered 5 mins ago
Zouya BilouniZouya Bilouni
1
New contributor
Zouya Bilouni is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
It is highly recommended to stack as much anti-virus as possible. For my part I install :
- Comodo Free Antivirus.
- Avira Free Antivirus.
- Avast Free Antivirus.
- AVG Free Antivirus.
- Kaspersky Lab Internet Security.
- Bitdefender Antivirus Free Edition.
- Sophos Home Free Antivirus.
- Microsoft Windows Defender.
Of course, this is on top of Norton ;)
For more info, you can refer to this video :
https://www.youtube.com/watch?v=dQw4w9WgXcQ
answered 5 mins ago
Zouya BilouniZouya Bilouni
1
New contributor
Zouya Bilouni is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
It is highly recommended to stack as much anti-virus as possible. For my part I install :
- Comodo Free Antivirus.
- Avira Free Antivirus.
- Avast Free Antivirus.
- AVG Free Antivirus.
- Kaspersky Lab Internet Security.
- Bitdefender Antivirus Free Edition.
- Sophos Home Free Antivirus.
- Microsoft Windows Defender.
Of course, this is on top of Norton ;)
For more info, you can refer to this video :
https://www.youtube.com/watch?v=dQw4w9WgXcQ
answered 5 mins ago
Zouya BilouniZouya Bilouni
1
New contributor
Zouya Bilouni is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
It is highly recommended to stack as much anti-virus as possible. For my part I install :
- Comodo Free Antivirus.
- Avira Free Antivirus.
- Avast Free Antivirus.
- AVG Free Antivirus.
- Kaspersky Lab Internet Security.
- Bitdefender Antivirus Free Edition.
- Sophos Home Free Antivirus.
- Microsoft Windows Defender.
Of course, this is on top of Norton ;)
For more info, you can refer to this video :
https://www.youtube.com/watch?v=dQw4w9WgXcQ
answered 5 mins ago
Zouya BilouniZouya Bilouni
1
New contributor
Zouya Bilouni is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 5 mins ago
Zouya BilouniZouya Bilouni
1
New contributor
Zouya Bilouni is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 5 mins ago
Zouya BilouniZouya Bilouni
1
answered 5 mins ago
Zouya BilouniZouya Bilouni
1
1
New contributor
Zouya Bilouni is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Zouya Bilouni is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Zouya Bilouni is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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3
So you have found one place that carefully says that having 2 AV's might not be bad. But you disregard all the other sources that claims it is bound to cause problems?
– Nifle
Jun 18 '12 at 7:54
1
No one's ever given me reasons to believe 2 AV's are bad.
– Celeritas
Jun 18 '12 at 18:34
1
Antivirus buries itself so deeply in the OS anymore that eventually the two packages will get in a turf war, have a rather intense knife fight and your computer as the innocent bystander will end up in the computer Hospital ER bleeding its bits out. The Cold War comes back with full nukes if you ever get McAfee and Kaspersky to install in tandem... That's why they always check on install for incompatible security software anymore and prompt you to remove one.
– Fiasco Labs
Aug 27 '14 at 3:58