Hello dean22952,
please gather AVG installation logs and MSinfo32 output, upload it in an archive (zip file) to favorite online storage and provide us with link to it, so we can analyze the situation.
Thank you
Trying again to install AVG 2011 Free. Downloaded install from AVG, saved to desktop, restarted. Opened file, ran it and I get Set up Error,Error Code-0xC0070643,Error message-General Internal Error,Add.Message-License Save failed 0xE0020001, Context- MSI Action Failed. My old AVG10.0 was working just fine, now trying to install your new version leaves me no protection.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic