Lots of sellers on e-bay advertising discs for cleaning or fixing your p.c. because its running slow, a vast majority of these can be downloaded FREE just search " Registry Fix or Registry Cleaner" You will only get the FREE download trial you will have to purchase the FULL working product.
You can of course use the disc fragmenter on Windows which is free and should be in you p.c. already and also the disc cleaner which should be with the disc fragmenter.
Both work extremely well.