My 80 gig western digital is making a strange clicking noise when I turn on my pc. When it gets to the window loading screen, it reboots itself. I cant even get into safe mode without it rebooting. Is this a bad hard drive? I am now using it as a secondary hd and it works fine. All of my stuff is still there. I even downloaded the tools from their website and ran a diagnostcis test and it said my hd is fine. What could be the problem?