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AVG Accidentally Removes Critical Windows File
Posted by Regeneration on November 13th, 2008, 11:32 PM

What was discovered was that the new virus definition file mistook user32.dll, a critical Windows component, for a container for the Trojan Horses PSW.Banker4.APSA or Generic9TBN. When the scanner went active, it deleted this critical file, thinking it contained a virus, causing the system to crash. AVG recommended users whose definitions auto-updated delete their virus definition file and cancel any scans they have running.

If your computer is affected, it will either stop booting or go into an endless reboot loop. Vista users can breathe a sigh of relief -- so far that OS has remained relatively unaffected. Windows XP users, however must now exercise extreme caution, or risk having to carry out a bothersome repair process.

You can read the entire article at DailyTech.

12 Comments
Oh crap ! I am using AVG and windows XP and I have auto update enabled AND I have scheduled scans everyday at 12:00pm .........
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Avira Free is a lot better then AVG Free. It has some nagging screen but the detection range is better and no mistakes like these.
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yea avira is much better then avg, avg has very poor detection rating, also its possible to get rid of the nag screen just by marking one of the exe's as not allowed to execute
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Heads must roll for this ridiculous blunder...
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Originally Posted by Regeneration View Post
Avira Free is a lot better then AVG Free. It has some nagging screen but the detection range is better and no mistakes like these.
This was just a one-time mistake AVG made, we don't need to get all crazy and start thinking that AVG is not good anymore. Relax a bit.
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avg was never really good, it has a reletivly low detection rating, something like 82% while avira is something like 95%, plus avira has a better feature set and much better realtime protection. Also i beleive antivir operates with the smallest footprint out of em all but i could be wrong on that one
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avg, like many av progs, is notorious for false positives...

i don't put faith in any of them...
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yea but having one is better then not, especially here where the ISP's will suspend your services if you get a trojen or worm, first time its a day, then a week, then a month and then you get blacklisted
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Originally Posted by -Shockwave- View Post
This was just a one-time mistake AVG made, we don't need to get all crazy and start thinking that AVG is not good anymore. Relax a bit.
It already happend in the past. This "one-time" mistake shows they aren't even testing their stuff before they launch it. They should test their virus definitions before they release it. Why the hell would "80 million users" [sic] reinstall their OSes just because AVG are too lazy to beta test their stuff?

Last edited by Regeneration; November 16th, 2008 at 07:52 AM..
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wow how do they manage to do this twice in a week, first the user32 file and now this.
i use Avast free for about 1.5 year now and i like it. before that i used Avira Antivir.
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AVG is probably okay for the many, but I had numerous crashes on my computers when I tested it out, now I am using Avast, the free edition, and I had never had a problem.
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thing is, avira has the best dection rating out of the free ones, the smallest footprint and probably the best realtime guard so why anyone would use anything else is beyond me
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