Hi, There
As I known based on your information that your ESU key is still fine, Windows just hasn’t recognized it yet. That’s common on domain PCs.
You can try this and let me know if the issue gone or not:
- Install KB5015684 (ESU prep update) and the latest Windows 10 SSU.
- Run as admin the CMD:
slmgr /ipk <your ESU key>
slmgr /ato
=> Restart your PC.
- Then run:
wuauclt /detectnow
usoclient StartScan
=> Wait a bit and check Windows Update again.
*BUT If it still shows “unsupported,” make sure WSUS allows ESU updates or temporarily disable the “no external update” policy.
Once the prep update is in, you’ll see the green “You’re up to date” message again.