Fix: The Windows Installer Service could not be accessed

If when you install, uninstall, or update a program on a Windows computer, you receive an error message and you are unable to complete the installation, then this article may interest you.

You could receive any of the following error messages:

  • Windows Installer Service couldn’t be started.

  • The Windows Installer Service could not be accessed.

  • Could not start the Windows Installer service on Local Computer.

This could happen if the Windows Installer Engine  is corrupted, installed incorrectly, or disabled. In such a case, you may want to try one or more of the following troubleshooting steps:

1. Please ensure that you are logged in as Administrator. If not login as Admin and try again.

2. Open a command prompt window, type msiexec and hit Enter. If the following window opens, fine.

windows installer msiexec Fix: The Windows Installer Service could not be accessed

If you receive an error message instead, note down the error message and try to search for it on the internet.

Incidentally, you will be able to see all the command line switches here. One cannot, by the way, run the msiexec.exe program without specifying at least one switch.

3. Open services.msc and ensure that the Windows Installer service is set to Manual. If it is not started, please start it and try again.

4. If you are running Windows XP, open  command prompt window and type the following commands one after the other and hit Enter:

msiexec /unregister

msiexec /regserver

This will re-register the Windows Installer engine in Windows XP.

5. If you are trying to update software program on your computer with an updated version, uninstall the previous version of that program first, and then install the updated version.

6. Run System File Checker, reboot if asked for and try again.Hope something helps!

7. Reset the Windows Installer Service Registry settings to its default values.

Download this registry fix mentioned in KB2642495 and add it to your registry. Do create a system restore point first before applying this registry fix.

UPDATE: Capt Jack has a tip for Windows 7 64-Bit users.

You could go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSIServer registry key

Select WOW64 REG_DWORD entry on the right pane.

Right-click on WOW64 entry and select Modify.

Change the Decimal value from 1 to 0 and press OK and reboot the System.

Want to know how to make Windows Installer work in Safe Mode?

Posted by on , in Category Windows with Tags
Anand Khanse aka HappyAndyK is an end-user Windows enthusiast, a Microsoft MVP in Windows, since 2006, and the Admin of TheWindowsClub.com. Please create a System Restore Point before trying out any software & be careful about any third-party offers while installing freeware. Add me on Google+.
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