One of the more difficult things to do, but can REALLY cover most of the previously mentioned tasks is to reinstall your Windows Operating System. This isn’t for the faint of heart, and should be done by someone experienced with it. It WILL erase everything on your computer. So a good backup is extremely important! Talk to your local PC repair tech about this one. Shouldn’t be very expensive to do, if you want to go this route. But it will make that PC run like the day you got it, or even better!