hi guys could any one help my pc keeps freezing on me normally when i am on the internet sometimes i have to restart my pc to get it to work again. only once so far it came up with a blue screen saying it was shutting down to protect my pc could not read much as it did not stay up for long. i have downloaded ccleaner to clear registry no effect at all. done muti virus scan using differnt scanners checked hard drive for errors there is none. also some times my mouse icon goes pixel looking or gets stuck looking like the i symbol when you are typing. i dont no what else i can do please help