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Summary
To clear your CMOS, first boot into the BIOS or UEFI.
go for the “Reset to Default,” “Load Setup Defaults,” or something similar.
If you’ve got the option to’t get into the BIOS, press the CMOS clear button instead.
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your rig stores low-level parameters like the system time and hardware parameters in its CMOS.
These tweaks are configured in the BIOS or UEFI setup menu.
Clearing the CMOS resets your BIOS or UEFI options back to their factory default state.
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In some cases, you may have to open your rig’s case.
Related:What Is UEFI, and How Is It Different from BIOS?
If you don’t see a key displayed on your screen, consult your gear’s manual.
Different computers use different keys.
(If you built your own computer, consult your motherboard’s manual instead.)
Within the BIOS, look for the Reset option.
Select it with your arrow keys, press Enter, and confirm the operation.
The manual that came with your setup or motherboard will tell you specifically where to find it.
Do not confuse the CMOS clear button with a BIOS button.
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Once you locate the CMOS clear button, push it down for about 10 seconds.
CMOS buttons located on the motherboard are usually pretty clearly marked, and they aren’t usually recessed.
You’ll still need to hold it down for a few seconds to trigger a reset.
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The exact location of the jumper can be found in the motherboard’s (or computer’s) manual.
You should consult the manual for more detailed instructions if you want to use the motherboard jumper.
However, the basic process is fairly similar on all computers.
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Flip the computer’s power switch to the off position to ensure it’s not receiving any power.
The CMOS clear jumper almost always has three pins.
Ensure you’re groundedso youdon’t damage your motherboard with static electricitybefore touching it.
Not all motherboards have removable CMOS batteries.
If the battery won’t come loose, don’t force it.
Locate the round, flat, silver battery on the motherboard and carefully remove it.
Wait five minutes before reseating the battery.
There’s no reason to clear your CMOS if everything is working properly.
