Fix “Invalid Update Control CTF File" Error in AVG 8.0

I use AVG 8.0 Free with Vista. AVG 8.0 normally checks and updates its virus definition automatically, but since the past couple of days it was not updating automatically. When I try to manually check for updates, I received this error message “Invalid Update Control CTF File”.

After doing some research, I found the solution to this problem on AVG forum. You need to remove the CTF temp files in C:\Documents and Settings\All Users\Application Data\Avg8\update\download. There were two files in that folder – avginfoavi.ctf and avginfowin.ctf, deleting them solved the problem and I was able to update AVG 8.0 with latest virus definitions.