Linux is pretty impervious to windows and mac virus's which are the most common. You can be on literally any website to worry to keep a subscription to a Anti-Virus. Also most people have problems with getting Windows drivers to work on linux. There are many tutorials to do so, just requires some work.
What you need:
*Ubuntu 9.04 ISO *Download*
*2GB (or larger) Flash drive (fat32 formatted *Not included in instructable*)
These are optional if you got a bigger flash drive and you want to use more than 2gb of it. The default Usbuntu files only take up 1gb for system and 1gb for files and settings. These files change how much space files and settings will take up. Pick one its not possible to do 2 at a time.
*(Optional) 2GB casper-rw loop file *Download*
*(Optional) 3GB casper-rw loop file *Download*
*(Optional) 4GB casper-rw loop file *Download*
Step 1: Set the Files in Place
First, put the U904p.exe on the flash drive and run it. (I think you must have 7-zip) Then, you put the Ubuntu Iso in the U904p folder. Finally, from the U904p folder run U904p.bat. It will then ask you for the Flash drive letter, enter it and press enter. It will set up all the files you need.
If you downloaded one of the casper files then you need to rename it to fit the one that is already in the U904p folder, then replace it. There you go!