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I am guessing that you are talking about the CPU or another name is the processor. You can replace the fan on the desktop, because that fan might not work correctly or you can have someone who works with computers replace the thermal grease paste compound touching the processor and the heat sink. One more thing you can do is replace or add ram to make the desktop go faster without doing the other steps or if you would like to keep the desktop for a while do all three. Processors don't really go bad, it is usually the components working with the processor.
go to staples they are usually very helpful
USB.
A notebook is a smaller computer that is mostly used for web surfing. A laptop is a fully functional computer that can replace a desktop computer's functionality.
These days a laptop can do anything that a desktop can do plus with the added benefit of being mobile. I built a super fast top-of-the-line desktop 1 year ago, the laptop i bought for half the price 6 months ago was faster. Therefore there is only one reason left to build or buy a desktop and that is slightly cheaper components and price. For me, I will never buy or build another desktop for myself.
No. The newer processor will not use the same motherboard.
Since the motherboard serves as mounting or connecting base to all components in a computer you will have to diassemble almost everyting in order to replace it. You should be able to do it without diassembling the optical and hard drives and the power supply.
It depends which component you are trying to replace, but almost all of the components are installed upon the motherboard, the CPU often below the heatsink (fan); the ram is in sticks and the psu is at the back, off the motherboard.
Laptop parts are not the same from computer to computer, whereas desktop parts, with the exception of the plastic case, are fully interchangeable.Laptop parts are WAY smallerLaptop parts are extremely hard to replace because laptops are made so that you cannot open it, even to just clean the fan.
The exact steps to replace a hard drive depend on the computer you are replacing it in. The general method is to open the computer and remove components until you get to access to the hard drive. Make sure you are grounded so you don't fry anything with a static shock.
The water pump and timing components should be replaced at intervals specified by manufacturer and you may replace just the idler pulley.
It is a relatively straightforward task to find instructions from a computer course on how to clean or replace a computer fan, but they are such cheap components these days it is not worth making one yourself.