Ok here is another one i have posted long ago

My PC speed was at 2.8 ghz till i did something which i dont REMEMBER because it was long time ago and now it has gone down to 1243 ghz.

WHY ?
How will i getted back?

Spec:
Microsoft XP Home edition
Service pack 1
ADM Athlon XP 1243 Ghz
Motherboard chipset - nVIDIA nFORCE Ultra 400
System memory of 512MB (PC2700 DDR SDRAM)



ThankAccess your CMOS Setup UTILITY and check the setting in your BIOS for CPU speed. If you have a User's Guide/Manual for your motherboard, that would be very helpful. If you don't have one, visit the manufacturer's website and search for a downloadable manual. I dont know what to look for but i will give a go
I am not that good at hardwareThis may be helpful: http://www.michaelstevenstech.com/bios_manufacturer.htm. And this: http://www.cyberwalker.net/faqs/reinstall-reformat-winxp/enter-BIOS.html

I've experienced what you've experienced, more than once. My processor is an Athon XP 2200, with a standard clock speed of 1.8GHz. About 4 or 5 times last year, my System Properties panel would show a speed of about 1.5GHz. Every time, the cause was the same; the correct BIOS setting got lost.

Motherboards have a small battery on them that's needed for your motherboard to store certain settings while your COMPUTER is off. This includes time and date, also. If this loss of the correct CPU speed becomes a persistent problem, and you experience other SYMPTOMS such as loss of correct time and date, this is an indication you may need to replace that battery.

Thanks