Its an AMD Athlon (the book said Duron, but the computer @ startup says Athlon). The Mainboard is an MSI K7 Master-S (MS-6341) and yes, it has the CMOS jumper (and a bunch of others too). I reset the jumper when this happened, but didn't get the desired result.
Is there a way that I can test the CPU?? Or does it require specialized equipment?