Based on a reply at another forum, I attempted to use disk management to mount a system image backup as a virtual hard drive, but this doesn't work so I unmounted it. This appears to have triggered Offices 2013 to state my system hardware had changed and I had to reactivate Office 2013.
I'm considering buying a third party backup application that creates mountable virtual hard drive images. I'm wondering if every time I mount or dismount a virtual hard drive, if Office 2013 or other Microsoft applications are going to ask for re-activation.
The forums have been moved to Q&A, so I'm not sure what forum this question should be posted at.