I have a amd 965 BE x4 processor, 4 gigs of ram and run a win 7 64 bit pro edition. I have an 4 year old 250 gig 8mb cache WD hard drive. My computer has been experiencing lag recently, mostly when im browsing the internet and was wondering if it could be my hard drive. This hasnt happend before so i was wondering what the possible reasons could be. Thanks!