Tonight I accidently removed a .dll file, and performed a system restoration. All went fine with the exception that my PS/2 mouse no longer works. I've also tried installing it as a USB mouse. The pointer just stays in the center of my monitor. I've reseated my memory, and CPU. I tried setting all my BIOS settings to Fail-Safe and removing my battery to clear my CMOS. All to no avail. Anyone got any ideas? Can someone refresh me on how to do a safe start on WinXP?