Using WINXP SP3. I have tried every combo of F10, F2, DEL, ESC+F10, ESC+DEL, etc, etc, etc. Default is F10 to enter bios. I have removed the battery and reset bios. I have changed the amount of RAM. I have removed the drive cable. I have forced keyboard error with both ps2 and usb keyboards. I have flash upgrade Bios. Still can not enter bios. The F10 option is always there but when I hit it, it just takes me to the Windows screen. Please help and thanks in advance.