Microsoft rolls out Windows 7 Update KB4073578 and Windows 8.1 Update KB4073576 for the AMD devices facing unbootable state issue. This latest KB4073578 update is available to download for the systems running Windows 7 SP1. You can download KB4073578 either through Windows Update or by accessing offline installer links.
Microsoft didn’t reveal known issues on the support page, hence probably you will not face any major issue after installing the KB4073578 update. But if you encounter any issue, you can report to Windows team.
If you are running Windows 7 Service Pack 1 on AMD device, you should apply this update to fix unbootable state issue. Restart your system after installing the update to apply the patch.