So I have Windows 7 first of all. But recently a power outage went down in the area. I think it may have affected this problem. But every few seconds my screen will freeze or starts being really slow. Most of the time I can still move the cursor but it doesn't do anything when I click or roll over things. I know I need to clean the dust from my computer so im about to do that. I think I may have pulled a cord because I just remembered the side of my computer fell off a few days ago as well. But please help, thanks!