How can I detele all downloaded files on my computer using Windows XP?

Answer 1

Do you want to delete all temporary downloaded files from the Internet? If so its easy. Click on tools on your browser, select Internet options, Under the General tab, under browsing history click on Delete. It will then give you a pop-up to select what you wish to delete.
One other way without browser is..
Go to Start, Control Panel, click on Internet options. Under the General tab, under browsing history click on Delete. It will then give you a pop-up to select what you wish to delete.

Answer 2

try this, to get rid of installed programs selectively:
start menu-->control panel-->add or remove programs
for temp internet files:
IE-->tools menu-->internet options-->delete files (check box on popup then click ok)
hope that helps =D

Answer 3

You can however if you are looking to wipe and totally erase files, try buring the distro DBN.