I'm using Window 7 Ultimate. I get a problem with two processes, namely explorer.exe and sometimes dwm.exe. The two processes tend to use cpu between 20-30%. And it only occurs when i play some game on my PC. My PC works perfect until I play some game. And another important observation: They consume no cpu as such but only consumes when I try to refresh my desktop. I mean when I right-click on desktop. It takes seconds for refresh. I have no virus problems. I had already tried following things: Kill explorer.exe and relaunch from task manager. (Problem still persists) Kill dwm.exe, well it relaunches again. (Problem still persists) Log Off and Log On. (Problem still persists) Restart. Problem Solved. (But need an alternative). Can anyone kindly suggest some quick fixes to the problem?