If you go to these sites:
http://www.piriform.com/recuva/download/portable
http://www.piriform.com/ccleaner/download/portable
http://www.piriform.com/defraggler/download/portable
http://www.piriform.com/speccy/download/portable
you get them FREE and they are legal
so what you do with all 4 is:
open them with WIN-rar or such a program, put it in your L:\PortableApps (or, you could put in a separate folder with in that folder, as I did like L:\PortableApps\ccleaner the drive letter will vary with computer) then open, and use them.
Here's where to get info on what each does (for those who don't know)
http://www.piriform.com/recuva/
http://www.piriform.com/ccleaner/
http://www.piriform.com/defraggler/
http://www.piriform.com/speccy/