Make a first your PC than use this tag :
1.At first on your computer than you got to start in your computer.
2.Than you go to run button.
3.Than you at first type tree than OK button click.
4.Type %temp% than OK click and delete this file.
5.Type recent than OK button click and delete this file.
6.Type prefetch and delete this file.
7.Type help and OK button click.
8.Cmd.
9.Dxdiag.