My GPT Drive will not Boot. It does not appear in the BIOS? Windows Boot Manager is also gone.

[MJJRLynch]

The Bios formerly offered UEIF but not now.

Is there a way to turn it on or off under Windows-8.1?

[Lil_Boy_Blue · Accepted solution]

Hi

CMOS/RTC battery state?

Has the BIOS reset to defaults?

[MJJRLynch]

Battery is about one month old.

I did not reset the BIOS.

[MJJRLynch]

Just for safety, I replaced the Battery again, it Booted just fine.

Thank you.

[Lil_Boy_Blue]

Prego.