Users often face an issue when they buy their Windows or Office License for a single PC and later they have to move to another PC incase of new installation or system crash. So now how can you re-activate your license key on the new installation.
1) Firstly try by activating it online usually it allows second time activation on a single pc license.
2) If 1 doesn’t work than the setup would be asking you to activate it online and usually the number of local Microsoft Office is displayed on the Activation Screen. Call in there and provide the relevant Customer details they will activate the key for you in a few minutes.
My reply for this scenario was marked as an Answer on the MSDN forums, check out the link:
