Hi I am having a problem because my PC suddenly became super slow, at first I thought it's my CPU because it has is sitting at 75 degrees celcius at average temperature but now that I've brought it done to 40 after buying an after market cooler it's still super slow. I've tried doing re-format but it takes 24 hours to finish the task, normally it will only be a few hours. Am I correct that my HDD is at fault on this? I am having a dilemma if it's my MOTHERBOARD, RAM, POWER SUPPLY or HDD. Can anyone please help me verify so I can buy a new piece correctly.