I have 3 partitions with Windows 7, 8 and 10 installed. Office is installed on Windows 8 and I want to move it to 10. Office has 3 installs and I have used 2 and want to save the last one. Will moving from Window 8 to 10 eat up that last install?
No.....Moving it will be fine. Just make sure that you uninstall it first from 8 and then install on 10. This will preserve your 3rd install.
Playing the devil's advocate, how will it be known that I have uninstalled the key?
It has been my experience that MS does not control those licenses that closely. I have a two user license. Every so often I have to re-install. If there hasn't been a long period of time between re-installation MS challenges you to go through telephone activation, if a lot of water has flowed under bridge it just activates.
They have to have a way to allow you to re-install and there is a touch of the honor system.
Ken
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