Join Date: Apr 2009
Bikes: Forest Green Dahon Boardwalk
Depending on your Office key, the downloads from MS may work(not sure on that one: I use open office or Libre office, depending on which machine I'm using). As far as Win 7, if you can get a physical copy that matches your key, it should work on another machine.
That said: if this was a home build, you can't re-install using your key(I assume you are re-installing and updating, I know I would) AND use the key on your new machine(without violating the licence which M$ may eventually notice, and then deactivate/ban). If this is a OEM(dell, HP, etc) it should either have a restore partition(likely hidden) that you can use to wipe and reload the machine, although you'll have to either make or get replacement media from the OEM if you are going to dban.