Hello Graeme Macdonald, thanks for the extra detail.
Both installs really did complete: 25H2 on 13 Oct 2025 and the repair version on 29 Jan 2026 both show Successfully installed, and Windows Update wouldn't mark them that way unless the install committed. A flaky coffee-shop hotspot would have left a Failed entry, not a false success, so you can set that worry aside.
What's happening now is a separate, more recent event. The repair version was offered again, you downloaded it, and the install itself didn't finish because the hotspot dropped partway through. Windows Update is simply re-staging the same package because the last attempt didn't complete — that's normal retry behaviour rather than a loop, and since you never clicked Reinstall now under Recovery, nothing on your side is re-triggering it.
To actually finish it off, you've got two options.
The lighter one is to let Windows Update try again on a stable wired or home connection so the install can complete without the link dropping. If WU still chokes on it, reset the update components first from Command Prompt (Admin):
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net stop wuauserv
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net stop cryptsvc
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net stop bits
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ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
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ren C:\Windows\System32\catroot2 catroot2.old
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net start bits
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net start cryptsvc
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net start wuauserv
Then reboot and check Windows Update again.
The cleaner option, and the one I'd lean toward given WU has now failed once on this, is to skip Windows Update for this entirely and do an in-place repair upgrade from the ISO. On your question about installation media — yes, it's the full Windows 11, a single ISO file of around 5–6 GB from microsoft.com/software-download/windows11. You don't wipe anything to use it:
- Download the ISO
- Double-click it in File Explorer so Windows mounts it as a virtual drive
- Run Setup.exe from inside that drive
- Choose Keep personal files and apps when prompted
That reinstalls Windows cleanly over the top of your existing install, keeping your files, programs, and settings intact, and once it's done Windows Update should stop offering the repair version because the system has been freshly serviced.
Between the two, if you'd rather give WU one more try on a stable connection, the reset is the right step first. If you'd rather just be done with it, the ISO route is the more reliable finish.