I have recommended, and used AVG anti-virus protection for a couple of years or so. Never had any problems, and always seemed to work great.I have other safeguards like ZoneAlarm,Spybot,Ad-Aware, which I make sure are always upto date.Regular checks have always informed that my computer is clean.And I have no other reason to think differently. Yesterday I did an on-line virus check using Panda ActiveScan.After the check, I was told that I had four file infections, and Panda had disinfected these.Great I thought, my computer as been cleaned of an hidden problem, which AVG had perhaps missed.
I started a discussion click here I tried to download Norton on-line virus check,as a second check suggestion, but found that all seemed to appear to progress okay, nothing really happened. So I terminated the Norton connection.
AVG was issuing a new database download yesterday, so I commenced and install this.Everythings fine I thought. Tried my computer this morning only to be informed that AVG was corrupted. I then tried the AVG repair facility, but this would not work, so I had to un-install, then re-install AVG.Never had this problem before.
Any suggestions,as to what failed.Was it Panda.Was it a virus [that may still be lurking].Or as AVG let me down.Advice and suggestions very welcome.
I have a possible explanation, but it could all be a load of twaddle, anyway here's the theory.....
Sometimes a virus checker will scan for programs that have the ability to write to areas of the disk that viruses (virii ?) have been known to attack, like the MBR and boot sectors.
Anti-virus software generally has that ability, in order to disinfect the PC.
So running another A/V while one is active may pick up the original as a potential threat to the PC.
This scenario actually happened on my PC many years ago, when I was trialling I think it was Norton Anti-Virus, and another, I can't remember which. One picked-up the other as a possible virus, but the other way round didn't
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