i was given a pc tower,and as far i as know you can use the same leads for other pc's. i plugged it in all leads fit,turned it on and got warning cpu speed has changed and asks if i want to change it if i do change it what do i change it to? it says fujitsu,siemans t-bird ,pentium 3
if i don't change it,what will happen if i don't? and what could of caused it? im not using the original screen or leads because i don't have them.
Any computer shop will have them, cookie2459, even Tesco sells them I think. They're about €5. When you install the new battery and start up the computer, you will be asked if you want to reload the default settings, choose Yes. If you're not asked, then go into the BIOS , it'll tell you on the startup screen how to do that, usually something like "press F2 to enter Setup", and choose the "Load Default Settings" option. Press F10 to Save and Exit.
Yes it's called a CMOS battery, sometimes motherboard battery, sometimes BIOS battery, sometimes it's called by it's number CR2032. It supplies power to the BIOS in order that your computer boots up with the computer's necessary configurations, drive configurations, CPU settings, date and time and the other settings held by the BIOS. When the battery fails or runs down, those settings are 'lost' until the battery is replaced, that's why you notice that the clock no longer keeps the correct time when the CMOS battery is failing. It's just a guess, but the fact that your CPU settings have changed/are changing, lead me to think that your battery is on the wane.