microsoft word license problem

i downloaded a serial here and when i try to activate it a message apperas something like “microsoft key has been activated the maximum number of times permitted” well this is the first part of the message that appears and I guess I need to change the serial but how can I enter a new serial? please help I can’t use microsoft products in my computer because of this. Thanks
Answer #1
close the setup and clean your “temp files” just run the installer again
Answer #2
Get the Blue Edition of Office and, if you only want Word, that’s all you need to install. It doesn’t need activating.
Answer #3
Thanks guys! i’ll try it! thanks thanks!