Before upgrading from Windows 7 to Windows 10 I imaged the Windows 7 system using O&O DiskImage Professional. After a clean upgrade (wiped the original installation) I started restoring content, and eventually came across something I had forgotten to pull from my old personal folder before reinstall. To my surprise I couldn't access the \Users\MyOldFolder on the image, apparently because its Admin and user UUIDs were now different. As an admin on a new install I would normally just assume ownership of the old content and would be good to go, but the image is read-only so I can't alter the permissions on it.
My question is: Is there any way to access that content – i.e. as an admin of the Windows 10 Pro installation make Windows to ignore the offending old permissions? Or is my only option to write the image onto a disk so that I can modify the permissions as needed? I tried to turn UAC off but that did not make a difference.