A BIOS password is a protection measure that can be used to stop someone powering up a computer system or making changes in some of the computers most sensitive areas.
In all desktop PCs there is a battery – what is the purpose of this battery and how long does it last before it has to be replaced?
Does the replacement of this battery affect the BIOS of the computer?
While no longer the case, the term “CMOS” or CMOS battery lives on anyway.
The purpose of the CMOS battery most often today is simply to allow your computer to remember what time it is. If the battery dies or is removed, then when your computer boots it will have forgotten the current date and time.
If so, you'll need to reset your BIOS to factory settings.
Press the key to enter the BIOS, usually Del, F1, F2, or F10. I’ve had a PC for 6 years now and never replaced the battery.Actually all PCs, desktop and laptop alike, have a battery like this, typically referred to as the “CMOS” battery.How to Bypass or Remove a BIOS Password by Removing the CMOS Battery: The simplest way to remove a BIOS password is to simply remove the CMOS battery.A computer will remember its settings and keep the time even when it is turned off and unplugged because these parts are powered by small battery inside the computer called a CMOS battery.It has long become the global reference time in distributed computer systems and many other applications. Every IBM PC compatible computer features a battery-backed "Real Time Clock (RTC)" chip.