wow, this should NOT be in the open area, someone needs to lock this bitch down and delete it.
back to the topic, there are 3 types of keys, OEM(came on the computer), Retail (bought in store) and volume liscence (corperation w/ alot of computers runnign their own "build" of windows). your key needs to directly correlate to the version of windows that you have, or else it doesnt work.