you need to download the bios rom file, and boot into dos
(pure dos, no device drivers or nothing)
these days you can also flash from windows but a restart is still required
what you should do is
download
Everest Home
http://www.lavalys.hu/downloads/everesthome200.exe
and find out your motherboard manufacturer, and download the latest bios revision for your mainboard
and you can still get motherboards for your cpu type
