Here Is The Official Change Log For AVG Anti-Virus 2012 (2012.0.2171). Straight From AVG’s Main Site……
Program Update AVG Anti-Virus 2012 (2012.0.2171)
Fixes & Improvements:
– Setup: Fixed issue with installation fail while upgrading from AVG 8/9 to AVG 2012 SU4 (missing cabinet).
Till The Next AVG Update,