This just started. When I open a program or Windows Explorer it opens very, very slow the first time. If I close the program or Windows Explorer and re-open it, it will open fast the next time and each time thereafter. But, when I reboot the problem starts all over again. It almost appears that prefetch stops working after a reboot.

I checked all the normal things - defrag, check disk, msconfig, virus scan, temp files, temp internet files. Nothing works. I am loosing my hair. Can anyone help?

Dell 8200
Win XP Home SP1
P4 1.8GHZ
512 RAM

Thanks a lot.