Do you have enough ram? WinXP uses up most of 256Mg of Ram just for itself. If you do minimal multitasking 512Mgs will do however upgrading to 1Gig should handle most of the chores with memory to spare.
After upgrading from WindowsMe to XP, when trying to access My Computer using the desktop icon, it will take for ever to find it. The searching ?flashlight? will take over 2 minutes to open the My Computer window. Any suggestions?