New
#11
That's somewhat good news. :)
MSOffice should be linked to your MS account. If you log into
My Account
you can manage your install from there. You input your keycode, and it gets you to your product(s). You can either install live, or choose other/or offline installation, and get an ISO. You should be able to deactivate your current Office install from there.
Download and install or reinstall Office 365, Office 2016, or Office 2013 on your PC - Microsoft Office
Windows 10 should be activated then, which means you can clean install as often as you like/need, skipping when it asks for a code during install. I would also choose a custom install for W10 and nuke all partitions, so you are installing to an unallocated drive. That *should* make sure, if you had any infections, that they don't survive (of course, depends on the infection).
Good luck! :)