The programme Acolyte highlighted is not a Yahoo download. It is called Ccleaner and is one of the best freeware programmes ever. Use it and it will safely delete all the rubbish on your computer. It is less than 1Mb, I have used it for 2 years and comes highly recommended on this forum. It is safer than doing it manually. If you want to delete amnually you can delete all the files in Temp but I would advise using Ccleaner.