Move Windows 10 Bootcamp Installation to Parallels

Question. I have Windows 10 installed on an iMac (High Sierra) under Bootcamp. I am considering going back to Parallels 14.
If I want to wipe out my Bootcamp installation (must too large for the few programs I am still using Windows 10 for now) and then reinstall it under Parallels, what do I have to do to "de-authorize/de-activate" my original Windows 10 install so that I don't have any issues with I reinstall it under Parallels 14?
Thanks.

 

Hi SWANDY. Please contact Microsoft Support to reset the Windows activation key. Then install and activate Windows using Parallels Desktop for Mac which should work fine.