Hello,
Today I purchased the Avast Premium Security. I have had the Free version for a long time.
The thing is that now I cannot play some videogames. They require connection and I guess some component of the program is blocking them. I tried deactivating all program modules with no luck. I’m also totally unable of closing the program in order to also try that option. It’s also impossible to deactivate the initialization of the program when starting Windows… This antivirus in a sense is worse than a virus!! 
Many thanks for your help!
S