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How to Fix Windows Installer Service Could Not Be Accessed [SOLVED]

Windows Installer is an inbuilt component of Microsoft Windows. It comes to function at the time of installation, maintenance, and removal of a software process. However, at the time of any of these processes if you are facing “Windows Installer service could not be accessed” issue then you can proceed with this article. The context of this article will provide you with the complete solutions of how to overcome this Windows Installer issue.

Reasons For Why The Windows Installer Service Could Not Be Accessed in Windows 10

If any files of the Windows Installer gets damaged due to some unpredictable activities, then it will be the major cause for this issue. But if nothing as such has happened, then there is nothing to worry. Here we are giving you complete guidelines for resolving this problem.

How To Fix The Windows Installer Service Could Not Be Accessed Glitch

By applying the given solutions you may be able to resolve this problem. Follow up carefully

Fix 1: Remove And Install The Newer Version

Presence of the older version of a software may resist you to install the latest one. Hence if this is the case, then you need to uninstall the previous one from your system.

To do this at first go to the Control Panel and next set the View option to the Large icons by pressing the drop-down arrow. Then search for Programs and Features by scrolling down. After getting it you need to click on it, now you will be able to see all the installed program in your system. Now right click on the program which you want to download the latest version. And choose Uninstall to clear it from your PC. Next, try to get the newest version of that by opening a browser and search for it to download and to install it on your device. Now you may see that the program is getting installed in your system without any problem.

Fix 2: Verify That The Windows Installer Service Is Running


To do this at first, you need to open the Run command box by pressing the Windows key along with the letter R. Type ‘msconfig’ and click on Enter to open the System Configuration window. Under this window select the Services tab from the upper generating menus. Then you need to search for Windows Installer by scrolling down to this window.  Choose OK to confirm the changes.

Fix 3: Re-register Windows Installer Service

By re-registering the Windows Installer service, you may be able to fix this annoying problem. To do this, you need to follow the process which is explained below.

To initiate this process at first, you need to open the Run command box. Press the Windows key along with the letter R. Next type ‘cmd’ on it and hit the Enter button to execute this command. The black background Command Prompt will open with some messages on it and with a blinking cursor. Here you need to type some command as stated below. But remember that after entering each of the commands you need to press Enter.

%windir%\system32\msiexec.exe /unregister

%windir%\system32\msiexec.exe /regserver

%windir%\syswow64\msiexec.exe /unregister

%windir%\syswow64\msiexec.exe /regserver

After doing this select on the upper red cross button to close the Command Prompt. Next, you have to restart your computer device. Therefore follow the procedure to have re-registered Windows Installer. Now check if it fixes your Windows Installer service access issue.

Fix 4: Reinstall Windows Installer Service

After reinstalling the Windows Installer, you may be able to fix this glitch.

First of all, open the Command Prompt window. To do this open the Run box by pressing the four flag symbol Windows key along with the letter R and then type cmd on it and next press Enter. In the Command Prompt, you need to enter a list of command as below. Remember to press Enter after every command.

ren msi.dll msi.old

cd %windir%\system32

ren msiexec.exe msiexec.old

After this procedure, you need to close the Command Prompt window and restart your system. Restart is essential to complete the process. Next, open a browser and search for the latest version of Windows Installer from Microsoft Official Site, which is according to your system configuration.