I have noticed other, strange behaviour by Avast. E.g. Samsung Magician was not loading and/or not recognising my SSDs. I temporarily disabled Avast, and bang, the program worked at once!
I've also had problems installing some progs (though I haven't made a note of these).
Avast seems to be playing less and less nicely. Combine this with many issues I am experiencing with Comodo Firewall (also needs to be switched off to get some stuff to work), and I am considering taking my "free" custom elsewhere.