Posted by Howard H. on April 08, 2010 at 06:58:36 from (164.58.210.23):
In Reply to: OT-computer virus posted by Nancy Howell on April 08, 2010 at 06:33:43:
Hi Nancy -
That is tough. Sounds like they didn't get it totally removed the first time.
I've seen versions that will install scheduled tasks to "renew" themselves at some later point.
There are half dozen other ways they can "booby-trap" themselves back into existence, too.
Generally speaking, a rootkit is a more serious class of virus that either modifies part of the operating system files themselves. Since at that level of control, a virus can easily make Windows "lie" to you - and it sounds like you may have a rootkit - it is usually easiest to reinstall Windows. You can do that without losing your data by installing a new copy of Windows without doing a format first - or just back everything up to a flash drive and then do a format and reinstall.
If you don't have to have the PC for a couple of weeks, it often works to just set it in the corner off the Internet for a couple of weeks, then use a flash drive to put a copy of the latest Malwarebytes and/or Security Essentials on it and do a complete scan of the drive.
By not letting the virus update itself, and by getting a newer copy of an AV solution that is updated to be aware of that threat, it will often find and cleanly remove the original virus.
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