Hi, i'm having trouble with my harddrive when i turn the PC on it will act like normal for a while for instance i can play games or do windows tasks but at random times my computer will just die and it will act as if it is switching on and off over and over again rapidly. Also i have noticed that the harddrive is making more noise than it usually does and the computer in general has been running much slower than it should. Will i have to replace my harddrive ? i do not know what else to do about the problem, i have tried anti spyware and the like but normally the machine won't stay on long enough for them to finish. My machine is: Intel P4 3.0GHZ 1024MB Ram 120GB Harddrive Thanks For Your Help. Jay.