Thanks guys!
The whole purpose is that I install 10 home for the new owner. I won't tell him I have a pro licence as I want to use that on my new laptop ;). (Saving up for the new Dell xps 15...

My laptop is running 10 home, upgraded from 8.1 core. I have a retail license for Windows 10 Pro. Will installing Windows 10 Pro affect my eligibility to clean install Windows 10 Home (based on my...