There was virus, reinstalled Windows, then installed Kaspersky 2016 (pirated), and CCleaner. Now PC randomly slows down to a crawl so have to restart it every time. Weird thing this did not happen before reinstalling Windows. Also when playing online (CSGO and LoL) these games takes extremely long time to load and randomly freezes for 20-30 sec (again this problem did not happen before reinstallation of Windows). What to do ?