In desperation after a few tries, I just ran the Win 10 pro install and it worked without issue. I just couldn't get step 8 to work and got the message that the computer was being rolled back to the previous configuration. Otherwise it's possible to become an Windows Insider too (without the need to have an official product key): Update 6-7: When people may experience issues when downgrading, maybe this will help? Windows 7 Downgrader: Note: This guide will work for Windows 7 and 8 as well. With that you're done and a free upgrade to Windows 10 Pro is possible! Features missing are Enterprise options like Direct Access and language packs, but I don't miss them on my home PC. Change ProductName to Windows 8.1 Professionalħ. Navigate now to HKLM\Software\Wow6432Node\Microsoft\Windows NT\CurrentVersionĥ.
Change ProductName to Windows 8.1 ProfessionalĤ. Open regedit.exe and navigate to HKLM\Software\Microsoft\Windows NT\CurrentVersionĢ. Guide to downgrade Windows 8.1 Enterprise to Professional:ġ.