My friend's laptop started hard freezing randomly, except he could access the power menu. So i got him go restart in safe mode and run windows defender. A bunch of viruses were cleared out. He rebooted, but now although he can use the keyboard, chrome etc., is working, he cannot use his mouse. It shows the blue load circle instead of the cursor. Task manager also is not responding, so i cannot see load percentages. I think the problem is disk related. Advice?