A Fatal Error Has Occurred Loading The Metadata For Mscorlib.dll File

Microsoft provides a dedicated utility designed to detect and fix common issues with .NET setups.

After the restart, return to the same menu, the boxes, and let Windows download the files again. 3. Run System File Checker (SFC) and DISM

: The application or project is targeting a .NET version that is incompatible with the installed runtime or its referenced libraries. Broken Build Configurations Microsoft provides a dedicated utility designed to detect

Download and run the tool to automatically detect and fix setup or update issues. Alternatively, go to Control Panel > Programs and Features , find your .NET Framework installation, and select Microsoft Support

If the error persists or recurs after reboot, suspect hardware. Run System File Checker (SFC) and DISM :

Look for an event with ID 1026 or 1000 . Note the exception code:

The most common culprit. A system update or improper shutdown may have damaged the library files. Look for an event with ID 1026 or 1000

But then there is the ominous, stark message that halts progress dead in its tracks: