I know with my Samsung netbook, I attempted to load Windows 7 Home using a license key from work. I thought it worked, but then it eventually told me that the key was invalid for that PC (after I installed everything). (I guess it authenticated when I got it connected to the internet.)
Anyway, I was able to reinstall the original Windows 7 starter edition from a backup file that Samsung had created to restore everything to it's original configuration. So you might try and see if that option is available (in in your documentation or watch the boot up process to see if there is a option for Restore prior to the OS attempting to load).