[Fixed 2024] Windows Installer Service Could Not Be Accessed Error

How to fix Windows Installer Service Could Not Be Accessed Error on Windows 10? If you don’t know where the problem is, I can help.

Windows installers are important, and we all know that. But sometimes, when trying to install a new application, they cause issues or errors.

In an earlier article, I discussed how to fix the Windows installer not working error in Windows 10.

I have another error: Windows Installer could not be accessed in Windows 10.

This error occurs when users try to install programs that use MSI files.

Many users have reported getting this error when trying to install Microsoft Office.

When the Windows installer has not been installed correctly, you will receive the message “Windows Installer Service cannot be accessed.”.

Damaged or missing Windows installer files or registry corruption could be the cause.

Check This Article: How To Fix Windows 10 Activation Error 0x80041023

No matter the cause of the Windows Installer error below, try the solutions to fix the problem.

How Do I Fix “The Windows Installer Service Could Not Be Accessed” on Windows 10?

Fix 1: Confirm the Installer Service Is Running

The first thing you should do is confirm that the Windows installer is running.

Please follow the instructions given to you:

  • Click OK after pressing Windows + R keys.


  • Click the “Windows Installer” checkbox on the “Service” tab.
  • Click Apply, and then Restart.

If the Windows Installer Service cannot be accessed error has been fixed, check to see if it is still present.

Fix 2: Re-Register Microsoft Installer Service

If you find that the solution above does not work, then you can try re-registering the Windows installer service.

Here are the steps you need to take:

  • In the Run box, type cmd and enter

%windir%\system32\msiexec.exe /unregister
%windir%\system32\msiexec.exe /regserver
%windir%\syswow64\msiexec.exe /unregister
%windir%\syswow64\msiexec.exe /regserver

After each command, enter Enter.

msiexec /unregister

msiexec /regserver

  • If you are a 32-bit Windows user, then type each command below one by one.
  • To close the Command Prompt, type Exit and restart.

The Windows Installer Service has been reregistered. If the Windows Installer service could not access Windows 10 problem is resolved, check if it has been fixed.

Fix 3: Reset Windows Installer Service Registry

To perform the steps, you will need to add values to the registry. Before you proceed, make a copy of your registry. Modifying the registry incorrectly can result in serious damage to your system.

Follow these steps to back up your registry:

  • Hit Windows Key + R, type regedit, and hit OK.
  • When the Registry Editor is opened, select File > Export.
  • Enter the names of the fields and select All as the export range. Click Save.
  • In case something goes wrong, you can run this file to restore the registry.
  • Close Registry Editor

You will now need to add a.regfile to the registry. To do this, follow these steps:

  • Click File and then Save as. Do not type the filename repair.reg. Set Save As type to All Files and click Save.
  • Open Notepad.
  • Find the Repair.reg file, right-click it, and select Run this program as administrator.
  • Open Notepad.
  • And paste the below given text into Notepad:

Windows Registry Editor Version 5.00

  • Click yes when prompted.
  • Install the app again after adding repair.reg to the registry.

Fix 4: Uninstall the Earlier Version of the Software that You Want to Install

Uninstalling the previous version of software you wish to install is the best way to fix the problem.

Here are the steps you need to take:

  • Click Start > Control Panel. Under Programs,click Remove a program
  • Select the software that you wish to install.
  • Uninstall the program by clicking Uninstall. Follow the instructions on the screen.
  • Then restart your computer.
  • Install the program that you wish to install.
  • The program will not be completely removed if you uninstall it manually. Some traces or junk files may remain, which can cause problems when you try to install the program again.

It is best to use a third-party uninstaller in order to completely remove the program.

Fix 5: Change Remote Procedure Call Service

Several users have reported that they were able to fix the fact that the fact that the Windows Installer Service couldn’t be accessed by changing the settings of the Remote Call Procedure Service.

Here are the steps you need to take:

  • Press Windows key + R and type services.msc, then press Enter.
  • Double-click on Remote Procedure Call (RPC Service)  to open it.
  • Click on the Login tab and select “Local System Account.” Then, click on “Allow Service to Interact with the Desktop”.
  • Windows 10 will save your changes when you restart the PC.
  • Click on Browse, type in “Network Service,”  and then click Ok. The password will automatically be filled in, so don’t change it.

If you cannot find network service, then use the following address:.

  • NT Authority\NetworkService

Restart your computer.

Fix 6: Delete Duplicate msiexec File

It is important to check your msiexec files, as the PC can create a duplicate of a file that causes many problems.

Here are the steps you need to take:

  • Go to the directory located at C:WindowsSystem32.
  • Look for msiexec. The second file is 0KB and will not have an.exe extension.
  • Rename the duplicate msiexec to msiexec.old.

After changing the name, you will need to restart the Windows service installed in the Services window.


This is the Windows Installer Service that cannot be accessed in Windows 10. I did my best to provide a complete solution for the Windows Installer problem.

You can also find solutions here if, when installing an application, you receive the Windows Installer Service and cannot access Safe Mode.

Follow the instructions to fix your issue.

This simple rule, which I recommend, will fix the problem and prevent it from happening again.

Good luck..!

Leave a Comment