Hello to anybody who responds, I am really anxious to solve this problem. The thing is after I reboot my laptop( usually after hibernating, so not really a reboot) the laptop runs quite fast and I can play videos normally. Also, the CPU usage is about 3 or 4% only. But after a lapse of four or five minutes, the computer becomes way slow and the CPU usage become 100% and when I try to play videos, they are so slow that I see images instead of a video. I have tried scanning for viruses, spyware etc. nothing really seemed to help. I know this is an age old issue and there are a lot of forums regarding it but my case is a bit different. So, I would appreciate if anybody would like to help me. Thanks beforehand.