Yes, you can get more better explainations in avast’s help document by do a search with " exclude " word.

Please keep in mind that, if you want to try what I’ve suggested, you have to do a safe computing practice all the time.

I always do a scan in C:\WINDOWS*, C:\Program Files* by manual and by setup in avast screen saver.

If you don’t have a speed and performance issues with avast please don’t try this.