Windows tends to break down over time and stop working at the best possible speed. It’s not due to hardware issues but because your computer gets cluttered with all kinds of files and leftovers caused by program removals.
When this happens, it’s usually a good excuse to reinstall Windows or restore a system backup. However, you should first consider using a system optimizer since it might yield results faster.
There are several software applications that promise to get your PC in shape by clearing junk files, fixing errors, and making various tweaks. And one of them is AVG TuneUp.