i always use avast
i always download it from the official site.
i was using the avast 4.7 when i realize that the new avast 4.8 was available
so i donload it and the vps file too
i update the program and everything was ok at this time
when i update the vps file
appear an error window and in teh log viewer this message
Function setifaceUpdatePackages() has failed. Return code is 0x00000426, dwRes is 00000002.