what do you mean by clearing CMOS?
Clear CMOS by Reseating the CMOS Battery
P-CR2032 CMOS Battery. © Dell Inc.
Another way to clear CMOS is to
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Start by making sure your computer is unplugged. If you're using a laptop or tablet, make sure the main battery is removed too.
Next, open up your computer's case if you're using a desktop PC, or find and open the small CMOS battery panel if you're using a tablet or laptop computer.
Finally, remove the CMOS battery for a few minutes and then put it back in. Close the
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By disconnecting and then reconnecting the CMOS battery, you remove the source of power that saves your computer's BIOS settings, resetting them to default.
Laptops & Tablets: The CMOS battery shown here is wrapped inside a special enclosure and connects to the motherboard via the 2-pin white connector. This is an increasingly common way that manufacturers of small computers include a CMOS battery. Clearing CMOS, in this case, involves unplugging the white connector from the motherboard and then plugging it back in.
Desktops: The CMOS battery in most desktop computers is much easier to find and looks just like a standard cell-type battery like you'd find in small toys or traditional watches. Clearing CMOS, in this case, involves popping the battery out and then putting it back in.
Never opened up your desktop computer before? See
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