hi thanks.
I downloaded the avast free update
I have windows vista
I have also malwarebytes and windows defender
i did have clamwin for a while but used the unistaller tool and I think I had avast free last as well after using system restore last year.
yes it was acting normal the night before this happend
thanks for any help 
also this happend last night and now this morning (last hour) it has not come up at all and I can get into the control panel again ??? so now I’m really confused about it