Windows problem after AVG update

First I am very frustrated that it seems impossible to ask a question without going on this plarform. 
Reason I need to have contact is that after an update from AVG on 7th of January Windows on my pc (not android) does not shut off anymore; it stalls in shut off mode. 
I can not find anywhere how to solve this problem. Can anybody, preferably from AVG help??
Sorry, wrong category - must be pc.