The thing is, I have one partition with WinXP (I use it more) and the last version have issues with XP (constantly asking for reboot, and active protection shield messed up, can't delete avast desktop icon)
To reinstall the old version i have to use the AvastCleaner everytime. After reinstaling t old version and choosing the manual updates in both, Definitions and Program Version then reboot, it's all ok; but when i click to update only the definitions, it also update the program version. Or it update the program automatically after a few minutes.
I try everything except change Calendar, I'll try that now.