The Windows Installer Service could not be accessed or started

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

Fix Windows Installer Package errors

You could receive whatever of the following error messages:

Windows Installer Service couldn't be started.
The Windows Installer Service could not be accessed.
Could not offset the Windows Installer service on Local Estimator.

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:

one] Log in as Administrator

Delight ensure that you are logged in as Administrator. If not log in as Admin and try again.

ii] Does msiexec open up?

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

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

Incidentally, you will be able to see all the command-line switches hither. Ane cannot, by the way, run the msiexec.exe program without specifying at to the lowest degree one switch.

three] Check Windows Installer service status

Open up services.msc and ensure that the Windows Installer service is fix to Manual. If it is not started, delight starting time it and try again.

4] Re-register the Windows Installer engine

Open the command prompt window and blazon the following commands ane after the other and hit Enter:

                                  msiexec                  /unregister

                msiexec                                  /regserver

This volition re-annals the Windows Installer engine.

5] Uninstall & reinstall the programme

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

six] Run Program Install and Uninstall Troubleshooter

Run the Program Install and Uninstall Troubleshooter. This tool is the replacement for Windows Installer Cleanup utility which was discontinued. This tool will help you fix potential issues with Windows Installer.

Specifically, information technology will fix the following problems:

Issues that preclude new programs from being installed, uninstalled or updated
Corrupted registry keys that are related to these issues.

This troubleshooter works on Windows ten/8.1/eight/7.

vii] Run Organisation File Checker

Run Organisation File Checker, reboot if asked for and endeavour over again.

Read: Windows Installer Service missing.

eight] Reset Windows Installer Service Registry settings

Reset the Windows Installer Service Registry settings to its default values. Download this registry fix mentioned in KB2642495 and add it to your registry. Practise create a system restore indicate outset before applying this registry fix.

For Windows 64-Scrap users, open up Registry Editor and navigate to the following key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSIServer

Select WOW64 REG_DWORD entry in the correct pane.

Right-click on WOW64 entry and select Alter.

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

Related reads:

Access is Denied error while installing software on Windows
Windows Installer keeps popping upwards randomly
This installation package could not be opened.

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

Anand Khanse is the Admin of TheWindowsClub.com, a 10-yr Microsoft MVP (2006-16) & a Windows Insider MVP. Delight read the entire post & the comments first, create a Arrangement Restore Point before making any changes to your organisation & be careful virtually whatever 3rd-party offers while installing freeware.