I've noticed that there is a problem with DownThemAll also.
At the beginning of downloading AvastSvc.exe uses 30% of CPU for around 2-3 minutes.After that AvastSvc.exe uses
around 3% of CPU.
Also,there is no problem when downloading YouTube videos with DownthemAll.
What is wrong with Web Shield and download managers ?
Only things I've changed in Web Shield settings are heuristic (normal) and I checked PUP.