Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Did you look at the links on the right under the "Related Content" title?
Please give us the FULL and EXACT error message text.
Exactly how did you try to "Remove Office".
Have you tried the Fix It or manual process described in this tip:
http://support.microsoft.com/kb/2739501
Have you tried to first "Deactivate" your installation in the MyAccount page before doing the uninstall? You will be able to re-install and activate on this computer and STILL have 4 activations available for other computers.