Hi, I recently upgraded my Pc with a ASRock mobo (KT266 Chipset), Athlon XP2400 &512 DDR ram. I did a reformat/fresh install of winXP Pro. I have a second HDD, CDR/RW & DVD ROm drive. Graohic card is Nvidia Geforce 2 MX400/64. All drivers are current. The problem is that my hard drive seems to be almost constantly working, tho there is a pattern to it, the LED is on for 2-3 seconds then off for 1-2, then on for 2-3, then off for 1-2....and this goes on all the time. I'm completely baffled, and would really appreciate any advice. Norton AV is up to date, and no viruses detected. There are no trojans / spyware as this is cnstantly checked for nightly. The net result seems to be that everything takes ages to start, outlook express takes up to 90 secons to show up as do some applications. My CPU usage seems to be ok @ 5-10%. Thanks for any help.