HELP: Athlon Shows Duron

[SystemError]

Can anybody please explain why is this happening??

My Config is:-

Athlon XP 2000+, 1.6 Ghz 256MB RAM on VIA 266PM Chipset Mboard
XP Professional SP2

Today when saw the My Computer Properties the processor shows AMD Duron(tm) instead of AMD Athlon XP(tm)...

What could be the problem?

[ECE0105]

Check with CPUz for a better detail of the processor....

www.cpuid.com