Is there any (free) software out there that can check the health of my hard drive. I want to set up a dual boot system but I wanna check the physical integrity of my drives first. My secondary hard drive is a 4 year old 120 gb western digital. The reason I ask is that every once in a while, i hear small clicks which I think are coming from that hd. It hasnt happened in months but it has started up again today.