Hello,
Thank you for posting your query on Microsoft Community.
You may face this issue, if the media file that you are using for repair installation might have different architecture.
I would suggest you to create an new installation media according to your system architecture and then try to run repair installation.
Please refer to the link below to create installation media. You can create installation media for both architecture from this link.
Refer:
https://www.microsoft.com/en-us/software-download/windows7?wa=wsignin1.0
Hope the information helps. Let us know if you need further assistance with Windows, we’ll be glad to assist you.