Hi,
Thank you for posting in Microsoft Q&A forum.
1,Per the official document, the latest Configuration Manager version is not supporting Windows 7 device as a client. And also, Windows 7 is out of lifecycle for years, it's recommended to upgrade Windows 10 or 11 to get better support:
Supported OS versions for clients and devices for Configuration Manager
2,For troubleshooting suggestion, you can review the smsts.log on the client to see if there is any further information.
Thanks for your understanding. Have a nice day!
Best regards,
Simon
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