for intel its F8 for BIOS or F12 for boot options
for amd is usually delete and then exit the BIOS in safe mode. Depends on your motherboard I believe.
Opteron 175 + Scythe Infinity
2 gigs corsair XMS DDR 400
XFX geforce 6800 XT
30G Maxtor + 250G Maxtor
"Let's face it, we're not changing the world. We're building a product that helps people buy more crap - and watch porn." -- Seagate CEO Bill Watkins