There are 2 ways you can reset your bios. 1. On the motherboard there is a small watch battery. Remove this battery along with the power cable from the power supply. Hold down the power button to fully discharge the system. Wait 2-3 minutes then reinstall the battery and plug in your system. Your reset is now complete 2. Some motherboards have a 3 pin jumper by the battery. Lets say that the jumper is on pins 2 and 3. Remove the jumper while the machine is OFF and place onto pins 1 and 2. Power on your machine for a minute. (Note: Your system will not POST). Shutdown your machine and put the jumper back to pins 2 and 3. Your reset is now complete This is a great troubleshooting step for those of you having POST issues or no POSTing at all. Like other troubleshooting steps, this will not always work but usually will depending on the problem.

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This would probably make more sense to the novices amongst us if you explained why you would need to reset your bios. Some of the younger members may not have the first clue what you are on about.

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Normally after a bios upgrade you have to load bios settings with defaults.

Because some things maybe added in the newer version.
And they use bytes that were not in use in the previous version, so the setting can be anything.

Another reason is that you might have setup something that wasn't right (like CPU speed).
Then you have to clear the entire bios (like described here) because else the computer won't startup.

So in normal use of a computer you don't need to clear the bios, this is only when your computer doen't boot due to incorrect settings od CPU (or memory) or a BIOS upgrade.

But I thinks it's better to read the manual of your mainboard, because the procedure is not always the same.

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Thank you so much guys, You saved my life.. Yesterday I over clocked my machine too much and it wouldn't boot and I couldn't see where I could reset my bios. But after reading this guide, it was up.

Thank You!

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It is not neccesary to power your system on and off. Removing the battery for the CMOS ( complimentary metal oxide semiconductor ) will reset the BIOS (Basic input/output system) to default settings. There might also be an option within the BIOS to "Load Defaults" if that is all you are looking to do. You can also check your manual to see if you can locate a BIOS reset jumper on your motherboard.

-EchoTechsys

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Reseting BIOS
How To Reset Your Bios (guide)

According to the instructions from Tezza I did reset the BIOS by removing the battery and put it back together and it worked but it came back with instructions asking to set time I just clicked on continue to reset and it didn't set the time and the calender I had to do it manually will this affect it in a long run? Or should I have to reset it and set the time and the date through the BIOS?
By the way the computer runs perfectly at the moment.
Ta!

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Reset BIOS
How To Reset Your Bios (guide)

I recently had the same problem where the USB keyboard suddenly wasn't detected anymore after working well for more than a year since I bought the PC.

Removing the battery from the motherboard worked fine to reset the BIOS.
Even after the BIOS was reset USB legacy support was still enabled though.
Don't know what went wrong in the first place, but everything is working fine again now.

Thanx for the help!

-reply by Boenjan

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