AVG Anti-Virus 8.0 Virus Definition Update Error

Problem:
When updating AVG 8.0 virus definition
Receiving an error "Invalid Update Control CTF File".

Solution:
You need to remove the .CTF temp files in C:\Documents and Settings\All Users\Application Data\Avg8\update\download…. Dont delete all the .bin files in there unless you want to re-run all updates since your original installation. Only remove the avginfo files that end with .ctf.

There were two .CTF files (avginfoavi.ctf and avginfowin.ctf) in that folder.

Note: The Application Data folder is hidden by default. You need to enable Windows Explorer to show hidden files in order to view the Application Data folder. Alternately, type the above folder path in the Start, Run dialog and press {ENTER} to launch the folder.