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Windows Installer Service Missing; Error “The Windows Installer Service could not be accessed”

When you try to install a program that uses Windows Installer on a Windows computer, you may receive the following error.

The Windows Installer Service could not be accessed. This can occur if the Windows Installer is not correctly installed. Contact your support personnel for assistance.

When you attempt to start the Windows Installer service by running the net start msiserver command from Admin Command Prompt, one of the following errors may appear:

System error 1058 has occurred.

The service cannot be started, either because it is disabled or because it has no enabled devices associated with it.
The service name is invalid.

More help is available by typing NET HELPMSG 2185.

The above errors may occur even though Windows is already in Normal mode. Instructions in this article apply to all versions of Windows, including Windows 11.

Resolution

Start the Windows Installer service

  1. Launch Command Prompt as Trusted Installer.
  2. In the Trusted Installer Command Prompt, type Services.msc and press Enter.
  3. In the Services console, double-click Windows Installer
  4. Set the Startup type of Windows Installer to Manual
  5. Click Start to start the service. Note down the error message, if any.
  6. Click OK.

If the above steps do not help or if the Windows Installer service is missing in the Services applet, follow these steps:

Fix the Windows Installer Service Registry Keys

  1. Download msiserver.zip (for Windows 11, Windows 10, and Windows 7.)
  2. Unzip and extract the appropriate registry file to the Desktop.
  3. Right-click on the registry file and choose Merge.
  4. Click Yes when asked for confirmation.
  5. Restart Windows.

I hope that helps. If the issue is still unresolved, please comment with details about what happens when you start the service.

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