I don’t have an answer yet, but I found a thing assists about how to speed up my computer and it costs nothing, it is a free download. Here’s the link of CCleaner.
CCleaner is a freeware system optimization and privacy tool. It removes unused files from your system – allowing Windows to run faster and free up valuable disk space. It also cleans up traces of your online activities such as your Internet history. But the best part is that it is fast (normally in less than a second term) and contains no spyware or adware.

It finds the unused portion of garbage and debris left on your computer by other programs and every day operation, which has just slows things. Then, if you want it, it makes a back up file and then removes permanently trash in your computer.

The software really has a good job of cleaning things. It’s really surprising to see how a lot of unnecessary things up.

You can also see what is in the start menu so that you can change to the programs you don’t use everyday. Also a certain registry has ability to repair.

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