About a week ago when i start my PC before the Windows 7 load there pop up file researching. After that Windows starts normaly,I waited to everything on desktop load. Then I heard that hard drive stop spinning and after 1sec continue,it sounds like hard drive just started working. Then PC freeze on 1 min,after that time I can do all normally but it happens again after couple minutes. Today i tried to install new Windows but I can't because when Windows is installing it crash because hard drive stops and again start. My hard drive is Baracuda 1TB it's not old hard drive, I'm using it about 6 month already. Any help is good,thank you.