清除bios设置/power-on password/CMOS(再发无法进入系统的情况下依然适用)
Turnoffthecomputerandanyattacheddevices,suchasprinters,monitors,andexternaldrives.Unplugallpowercordsfromelectricaloutlets,andremovethecover.LocatetheClearCMOS/Recoveryjumperonthesystemboard.Ifnecessa