Many problems can occur when installing an HP printer. First, you might accidentally use the wrong installation package, or the installation package you are using might be corrupted. In addition, several errors can interrupt the installation of the printer and cause it to fail.

One such error is “Fatal error / MSI.netdevicemanager40”. The “Fatal error / MSI.netdevicemanager40” error can cause an HP printer installation to fail, regardless of which HP printer you are trying to install or which version of the Windows operating system your computer is using.

Affected users typically see the “Fatal error / MSI.netdevicemanager40” message during the initial stages of HP printer installation. The “Fatal error / MSI.netdevicemanager40” error message can be confusing to even the most experienced HP printer users, although this error is quite fixable.

If you suffer from the “Fatal error / MSI.netdevicemanager40” error and want to fix it, here’s how:

What causes the fatal error MSI.netdevicemanager40?

The cause of this fatal error lies in both the system and the installation package. A Windows PC may have problems with corrupted system drivers and/or the Windows registry. The installation software may also be faulty.

How to fix the fatal error MSI.netdevicemanager40?

Launch the printer troubleshooter

  1. Open Windows Settings (Win + I).
  2. In Windows 11, go to System -> Troubleshooting -> Other Troubleshooters.
  3. In Windows 10, it is under Update and Security.
  4. Find and run the printer troubleshooter.
  5. Select the printer that is having the problem.
  6. Allow the wizard to complete the process and try again.

Unregister the Windows Installer service and register it again

  1. Open the Power menu using Win + X
  2. Click Run or press R on your keyboard
  3. Type msiexec /unregister, then click OK.
  4. Open the startup window again, type msiexec /register, then click OK.
  5. Try reinstalling the software.

Reinstalling the HP drivers and software

  1. Start the software installation, and when it starts, click Cancel and complete the installation.
  2. Open File Explorer and type %temp% to find the temporary folder.
  3. Find and open the 7zXXX.tmp folder.
  4. Find the bat files starting with Uninstall_L3.bat or Uninstall_L3_64.bat.
  5. Double-click on them to run the uninstaller, which will ensure that everything you need is removed.