Windows XP
C:\Program Files\AVG or C:\Program files(x86)\AVG (for 64bit OS)
C:\Documents and settings\All users\Application data\AVG8
C:\Documents and settings\All users\Application data\AVG9
C:\Documents and settings\All users\Application data\AVG10
C:\Documents and settings\All users\Application data\AVG2012
C:\Documents and settings\All users\Application data\MFAData
Windows Vista/7
C:\Program Files\AVG or C:\Program files(x86)\AVG (for 64bit OS)
C:\ProgramData\AVG8
C:\ProgramData\AVG9
C:\ProgramData\AVG10
C:\ProgramData\AVG2012
C:\ProgramData\MFAData
C:\Users\<user>\AppData\Roaming\AVG8
C:\Users\<user>\AppData\Roaming\AVG9
C:\Users\<user>\AppData\Roaming\AVG10
C:\Users\<user>\AppData\Roaming\AVG2012