Antivirus Problems

Ignore it, Avg sucks :)

AVG has A LOT of "False Positives" which is the technical way of saying it's misreading files as a virus when it's not..

Get Avira Free Antivirus, uninstall AVG First, it's free & It Works!

If you want the best (at least considered by many anyway) then use Microsoft Security Essentials.

(Personally I prefer Avira)

You may only install one virus scanner at a time, and you may need to disable Real Time Protection in Windows Defender in order to use some Scanners, like Avira for example.

Real quick answer to your problem, AVG blows. Like _GTech said AVG has a history of false positives and is all around just not a very good antivirus. I use Microsoft Security Essentials on my netbook and I have Norton Antivirus 2011 on my laptop and have never had a problem. I used Security Essentials for a bit on my desktop as well before switching over to Kaspersky Antivirus 2011 which has done a great job with protection.

Another thing to consider, if you bought an expensive computer, DO NOT cheap out on the antivirus. You want to keep your good stuff extra safe. Microsoft Security Essentials, Kaspersky, and Norton (at least from my experience) are very good antiviruses and I am using all at the moment.

A quick side note, there is a reason Microsoft Security Essentials have been climbing the rankings in the antivirus field. Microsoft puts out this antivirus to protect their own OS. They know what can be exploited and they know what they need in antivirus to protect their crap.

Definately a false positive. I used to have AVG, I thought it worked a treat until I got Avast! on a new computer, it worked much better and doesn't use up as many system resources.

This link says it all...

http://www.matousec.com/projects/proactive-security-challenge/results.php

These tests are a barrage of PRACTICAL exploits that modern malware use to gain access to a system and lock out users. You may notice that AVG 2011, McAfee 2010, Panda 2010, and Norton 2011 are all fairly low on the result chart. All of these products rely on definition updates. They have little/no behavior analysis or heuristic-based capabilities. They may be able to block a known virus, but zero-day outbreaks can slip in, no worries.

Take a peek. I'm currently running COMODO Internet Security. It provides great out-of-the-box protection and has the ability to be customized to any construable setup.

There are something that you need to do when you get a new computer:

1. Uninstall all anti-virus running on your computer (running two at once can cause problems)
2. Download and install Avast Free anti-virus, http://www.avast.com/free-antivirus-download
3. Update Avast
4. Since you said AVG found a virus run a full scan with Avast

If no viruses are found then you are fine. Avast is a great program for being free.