1. Clean Up After Yourself
The number one thing I would say is the most valuable of these 7 simple ways of making your PC run faster is cleaning it up properly. That doesn’t only mean uninstalling software. From your browsing history to your files and folders, a lot of clutter slows your computer down so you should make a conscious effort to clean it up. If your browser takes too long to load, delete your history and cached files, given you don’t need them.
On Windows you can use utilities like CCleaner which will help you delete worthless files. As well as that, it can help you delete registry entries that serve no purpose or are broken.
On Linux, you can use a utility called BleachBit that does the same. Other than that, get familiar with the apt-get autoremove command.
On Max OS X, although it has a built in feature that takes care of your junk, you can use the CleanMyMac utility for the best results.