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Avg Has Found Trojan Horse Vb.cec


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#1 TJ_Sac

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Posted 12 January 2008 - 06:20 PM

Hi,
It seems I have another infection, todays AVG scan turned up Trojan horse VB.CEC in a 'C:\System Volume Information\_restore' file.
AVG put it in the Virus Vault, is this enough? Do I need to remove it and if so how?
Thanks.

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#2 quietman7

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Posted 12 January 2008 - 10:07 PM

When an anti-virus quarantines a file by moving it into a virus vault (chest), that file is essentially disabled and prevented from causing any harm to your system. The quarantined file is safely held there and no longer a threat until you take action to delete it. One reason for doing this is to prevent deletion of a crucial file that may have been flagged as a "False Positive". If that is the case, then you can restore the file. Doing this also allows you to view and investigate the files while keeping them from harming your computer. Quarantine is just an added safety measure. When the quarantined file is known to be bad, you can delete it at any time.

"Understanding AVG7 Free Virus Vault"
"AVG FAQ #647: I have some files in the AVG Virus Vault. What next?"

In your case, the infected file(s) was in the System Volume Information Folder (SVI) which is a part of System Restore. This is the feature that allows you to set points in time to roll back your computer to a clean working state. The SIV folder is protected by permissions that only allow the system to have access and is hidden by default unless you have reconfigured Windows to show it.

System Restore will back up the good as well as the bad files so when malware is present on the system it gets included in any restore points. When you scan your system with anti-virus or anti-malware tools, you may receive an alert or notification that a virus was found in the SVI folder (System Restore points) but the anti-virus software is not always able to remove it. Since the System Volume Information folder is a protected directory, most scanning tools cannot access it to disinfect or delete these files. If not removed, they sometimes can reinfect your system if you accidentally use an old restore point. Apparently, AVG was able to remove the file and place it in quarantine.

If in the future, if AVG finds such a file and cannot remove it, the easiest thing to do is Create a New Restore Point to enable your computer to "roll-back" to a clean working state and use Disk Cleanup to remove all but the most recent restore point.
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