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How to Fix Missing NULL Driver in Windows Fundamentals

Windows Fundamentals, or WinFLP, is a tiny old system wellusable on old machines. However, it is lacking NULL driver, which will probably cause many commandline installers to fail. This is how to fix it quickly.

Adding NULL driver to Windows

This is a rephrased, polished and updated walkthrough from original source here.

  1. Download null.sys driver and required registry settings from here.
  2. Copy null.sys to c:\windows\system32\drivers\null.sys.
  3. Run regedit and go to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Enum\Root.
  4. Rightclick on the Root folder, choose Permissions… and add the Administrator user with full control.
  5. Rightclick on the Root folder again and create a new key under it called LEGACY_NULL.
  6. Run null.reg unpacked from downloaded zip file.
  7. Reboot.
  8. Go to Device Manager, select View → Show hidden devices and find Null under NonPlug and Play Drivers.
  9. Under Driver tab, change Current status to Started and select Boot as a Startup type.
  10. Done!

Checking if NULL driver is present and working

  1. Open cmd.
  2. Write echo >nul.
  3. If no error is displayed, NULL driver is working well, otherwise you will see The system cannot find the file specified. error.


blog/odborny/2017-10-10-how_to_fix_missing_null_driver_in_windows_fundamentals.txt · Posledná úprava: 2019/10/08 23:03 od Róbert Toth