Hi @kbz,
Welcome to Microsoft Q&A forum.
Based on your sharing, it sounds like a simple network reset took a turn for the worse and left you in a bit of a loop. Since your Cloud Reinstall is hanging at 99%, it likely means the recovery environment is struggling to use your network drivers, the very thing you were trying to reset. We should pivot to local repair methods that don't rely on an internet connection.
1/ Rebuild the Boot records
Since the standard Startup Repair tool isn't doing the trick, we can try to manually nudge the boot configuration back into place via the Command Prompt.
- On the error screen, select Advanced options > Troubleshoot > Advanced options > Command Prompt.
- Type the following commands one by one, pressing Enter after each:
bootrec /fixmbr
bootrec /fixboot (If you see "Access is denied," continue to the next step)
bootrec /rebuildbcd
- Type exit, restart your PC, and see if Windows loads.
2/ Run an Offline System file check
If a system file was corrupted during the reset, you can attempt to repair it using the SFC tool from the recovery environment.
- Open the Command Prompt again from the Advanced options.
- Kindly find your Windows drive. Type
dir C:thendir D:until you find the one containing the "Windows" folder. - Assuming it is on C:, run this command:
sfc /scannow /offbootdir=C:\ /offwindir=C:\windows - Once that finishes, run a disk check to ensure the file system is healthy:
chkdsk C: /f
3/ Switch to "Local Reinstall"
The Cloud Download is likely failing because your network drivers are currently inactive or unstable. Windows 11 has a built-in copy of itself that you can use instead.
- Go to Troubleshoot > Reset this PC.
- Select Keep my files.
- When asked how you would like to reinstall Windows, choose Local reinstall. This avoids the 99% download hang entirely by using the files already on your drive
Note: If these steps don't get you past the black screen, the recovery partition itself might be damaged. In that case, the most reliable path forward is using a bootable USB drive created on a different computer.
I hope this helps you get back to your desktop quickly. Loong forward to your updates.