Ccleaner

Ccleaner 2.04 is a programme that makes it possible for you to delete all temporary files with one single click. This easily can save more than 100 MB of space on your harddisk.

But that is not all..
Ccleaner deletes Cookies, browsing history, list of recently opened files, temporary files, log files and memory dumps. These are overflowing files that only costs free space on your harddisk.

Also the mysterious Index.dat will be deleted. Ccleaner helps you delete overflowing files and causes no problem to your pc while using.