I have a Gigabyte GA-K8N51PVMT-9 motherboard with a AMD Athlon 64 3200+ CPU and 1Gig of dual channel RAM. I am using a seagate SATA2 120GB harddisk (ST3120813AS). For the past week, the hard disk LED of my system is continuously lit up in a cyclic manner. It flickers on and off between an intervel of a second. I have scanned my system for spyware or viruses but found none. Have also checked my task manager for any background processes but found none that could cause this. I am using McAfee anti virus which has detected nothing. I have only recently bought this stuff. Not more than a month old. IF some one could please possibly diagnose a solution for this, or tell me i this activity is normal in anyway. P.S. this activity is continuous from the moment the PC starts till i shut it off( interval of 12-24 hours).