0xc1900104

The 0xc1900104 error code is a Windows 10 installation error that occurs when the system reserved partition cannot be updated. This error is often accompanied by the message "We couldn't update system reserved partition" or error code 0x8000f0922. It typically arises during an upgrade to Windows 10 and indicates that the system reserved partition lacks sufficient space or has issues preventing the update. Users encountering this error may need to free up space on the system reserved partition or use disk management tools to resolve the problem. The error is specific to Windows installation and upgrade scenarios.