0x800f0952 Install Jun 2026

| Cause | Description | |-------|-------------| | | The system is pointed to a WSUS server that does not have the required feature files (e.g., .NET 3.5, language pack). | | Missing source files | The feature’s source files are not available locally or in the alternate path. | | Corrupted component store | CBS manifest or payload mismatch. | | Unsupported language pack | Attempt to install a language pack not matching OS edition (e.g., Single Language edition). | | Pending reboot or other updates stuck | Previous updates block new feature installation. |

The error code is a common Windows Update failure that typically occurs when the operating system attempts to install a cumulative update, a .NET Framework package, or a specific system component. This error indicates that the Windows Update service encountered an unexpected interruption or corruption within the update pipeline, preventing the installation from completing. 0x800f0952 install