Please be informed that this installation issue (based on analysis of provided installation logs) is caused by missing updated root certificates in your operating system Windows.
Please read through this FAQ about this issue resolution.
I have used AVG Free for a number of years without any problems. 2012 was installed and stopped updating last week, so I tried using the removal tool and loading the avg_free_x86_all_2012_2126a4890.exe version. Got a setup error, Error Code 0xC0070643.
After reading other posts I have saved msinfo and AVG log file to rapidshare:
Thank you in advance.