windows office: hey, i just did a clean install to windows 7 from vista. i tried to put in the key to use office but it says i have no more left.... i have used it on 2 computers 1 being the one i just upgrade so please help|||I have installed and reinstalled mine a dozen or more times (On the same three computers with my 3-license version) over the last two years and just installed it again yesterday. Never had a problem with keys. If you have legimate version you paid for then Microsoft will allow it if you call them for help.|||If you've used it 2x then obviously you only have 2 licenses (product keys are the license numbers).