Hi there. Try downloading a trial of Kaspersky AV 6.0, as it is alot better than AVG. (You can get 6 months free registration from PC Advisor, click here and sign in with your PC Advisor credentials)
After installing, open the program, on the left pane click 'Scan', click 'My Computer', then click the Scan button.
Leave it to scan, and then try removing the virus in that program rather than AVG.