Hi there,
New build intel DX79SI motherboard trouble accessing bios screen,press the relevant keys but no joy has 94_ in bottom right corner, the blank screen then_ appears then windows starts ?
Are you using wired or wireless keyboard? If wired, try a different USB slot?
See if you can get into bios like this
in windows, go to settings/update & security/recovery
under advanced startup, click restart now button
PC will restart and load a blue menu
choose troubleshoot
choose advanced
choose UEFI Firmware interface
PC should restart and load you into BIOS
Are you using wired or wireless keyboard? If wired, try a different USB slot?
See if you can get into bios like this
in windows, go to settings/update & security/recovery
under advanced startup, click restart now button
PC will restart and load a blue menu
choose troubleshoot
choose advanced
choose UEFI Firmware interface
PC should restart and load you into BIOS