OP .... do you know how to download an App ? if so, Google ' Advanced System Care ' .... hit the download, then open the file once downloaded, and hit the install button.
Once it's installed ' hit the run button.
Then let it remove and clean everything ..... make sure every box is checked to run, such as clean registry, junk files, privacy clear, internet, hardware .... and so on.
Thats it ... your PC will run faster and smoother once you run the application.