I am going to show you how to Install SLAX on your flash drive(from a windows computer). Slax is a small USB portable Linux distribution. Its a great way to get started in linux, because nothing gets installed to your hard drive. Its built on the KDE desktop environment, which is much like windows, so it should be easy for most windows users to use.
What you will need.
-A Flashdrive 256mb will do the trick but I would recommend 1gb or more.
-A copy of SLAX. You Can download it here
-About 20 mins
-And a file extractor capable of extracting .tar files. You can use 7 zip
Note: This is more of a desktop operating system, it is compatible with little to no wireless cards.