okay, you can go to the microsoft website, and download the file there, then you will need to install that onto a blank disc.
you should be able to use the oem code that should be located at the base of your pc
so in grade 10, our task was to attempt to hack our school network. if we suceeded, we would get an 'a' for the subject. i didnt really succeed in doing this, but instead destroyed the pc - that was running linux. pretty much i thought if i was able to disconnect the computer from the network...