This is a free utility that comes with your Windows system. It is kind of slow, but it does the job. There are other free ones you can find online if you search hard enough. What this software does is put your files back together, instead of having them in different locations.
I put in the max amount of memory my computer would hold
With the cost of computer memory being where it is today, you should put the most memory you can in your computer. If you are not sure how much it holds, just do a search online with your model number and it will tell you how much memory you can use. This will have an immediate impact in the speed of your pc.
Use registry repair tool
The registry is an area in the computer, deep into the computer, that contains a set of instructions, or directions, on how the software and hardware in the computer should run. If anything in here gets messed up, the software ends up looking for the wrong stuff, or looking for the right stuff in different locations. This can definitely slow up a computer.
Just the way Windows operates, you will get errors. This is why it is important to use a registry repair tool on a weekly basis to clean all of this up. This will ensure your computer will stay as fast as possible.
These are a few things I have done when I was asking how to speed up my pc. These things can also work for you.