1:Open Run Program
To delete temporary files you can first open run program from start menu or by pressing win+r key, and then computer will open a box which is like in the below pic.
To open temp folder you can write the command which is %temp%. After writing this command computer will automatically open the temp folder which contains temporary file.
When folder is open, you will see many temporary files in that folder, just you have to do is select all files and delete them. You can select all files by mouse write button or by pressing ctrl+A key.
Hope this technique will help you and don't forget to comment and share.