So you made it after several hours. :-)
Keep in mind that you have 2 Recovery-Partition now and a WIN10 and a WIN7 WinRE.wim. But that's easy to fix...
I found this comment in Answers.Microsoft.com:-
The file C:\$Extend\$RmMetadata is an old Windows system file. Windows doesn't use this but it's not...
This started with NTFS, a journalling filesystem that creates metadata continuously to help maintain data integrity. It's more complex than that but...