Randomly, about 2-3 weeks ago my computer began to run slowly. If I'm just browsing the internet or using word documents and things like that it is fine and I cannot tell. The problem lies in things like playing games or running programs like itunes. I checked for all virus/malware, and there was nothing that I could see. I did a defrag and cleaned/cleared the registry and temp folder. Does this sound like it could be a hardware or driver problem? If its not a virus, could you give me a few other reason a computer would start doing this randomly.