If you receive an error code 0XC1900103 MOSETUP_E_COMPAT_TIMEOUT when updating/upgrading Windows, it means that the compatibility issues were not resolved within the required time limit. This happens when you are upgrading using the Windows Upgrade Installer. The full error message includes:



The compatibility issues were not resolved within the required time limit.

The alternate way to resolve this issue is upgrading through Media creation tool or ISO file. For some reason, the timeout doesn't happen with the ISO method to upgrade