Solution 1: Update Windows Installer
Press Windows + R: Press the Windows key and R simultaneously to open the Run dialog.
Type "msiexec /unregister" and Enter: Type "msiexec /unregister" in the Run dialog and press Enter. This unregisters the Windows Installer.
Type "msiexec /regserver" and Enter: Type "msiexec /regserver" in the Run dialog and press Enter. This re-registers the Windows Installer.
Restart Computer: Restart your computer to apply the changes.
Install QuickBooks: Try installing or updating QuickBooks again.
Solution 2: Group Policy Update
Press Windows + R: Press the Windows key and R simultaneously to open the Run dialog.
Type "gpedit.msc" and Enter: Type "gpedit.msc" in the Run dialog and press Enter to open the Group Policy Editor.
Navigate to Computer Configuration > Administrative Templates > Windows Components > Windows Installer: In the Group Policy Editor, navigate to the path mentioned above.
Double-click on "Prohibit non-administrators from applying vendor-signed updates": Set this policy to "Disabled."
Click Apply and OK: Apply the changes and close the Group Policy Editor.
Restart Computer: Restart your computer.
Install QuickBooks: Try installing or updating QuickBooks again.
Greetings,
Peter