Hi, I'm John! I will help you with this.
If you haven't tried anything yet please start by: making sure there isn’t any third-party antivirus software running, since that can sometimes interfere with the enrollment. Restart your PC and check again. Also, please confirm that your Windows 10 is fully updated before trying again, as missing updates can cause this issue.
Let me know how it goes.
Click "Add comment" to let me know.
Regards,
John J.D.