tdsok

Dear all, I am having problems installing windows xp pro sp2 on a AMD duron 1.3 ghz + 512mb ram rig that i built myself from bits that i had lying around/begged/borrowed and never gave back. I run through the whole process of installing and everything goes fine, but when i restart it gives me the error "Error loading operating system" while still in the bios, just after the DMI check. Please help!