CMOS battery removal?
How long does a CMOS battery have to be removed for to reset BIOS to factory settings? I think I messed up my BIOS settings & removed the battery for a full minute & it made no difference. At least it appears so as my date & time was not affected. Nor was anything else.
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I usually leave the battery out overnight to be sure that the CMOS is cleared. 5 minutes is supposed to be enough.