This sounds rather serious, but always a way to fix this error. This guide will give you a bunch of solutions to help you resolve the problem.

Why is Windows Installer not working?

Here are some of the common reasons for Windows Installer not working issue.

The Windows Installer Engine is corrupted. There is a virus or malware on your PC. The Windows Installer service is missing some important files. Some of the system files are missing or corrupt. There is already an earlier version of the program installed on your PC.

How can I fix Windows Installer Service could not be accessed error on Windows 10?

1. Reset the Windows Installer Service registry

With registry backup created, you need to create a .reg file and add it to the registry. To do that, follow these steps: After you’ve added repair.reg to the registry, try to install the problematic application again and check if the Windows Installer Service could not be accessed error appears.

2. Start the Windows Installer Service manually

To check if the Windows Installer Service is running, you need to do the following:

3. Re-register Microsoft Installer Service

4. Use regsvr32 command

5. Use SFC and DISM commands

Once the scan is finished, check if the problem persists. If the issue is still present, or if you could not run an SFC scan, you might have to use a DISM scan instead. To do that, follow these steps: Once the scan is done, check if the issue persists. If you were unable to run the SFC scan before, or if the SFC scan was unable to fix the problem, repeat it and check if Windows Installer Service could not be accessed error is still there. A third-party software that can do this process automatically might be an easier solution. Restoro can help you scan your device thoroughly and offer you a detailed report of all impediments that can cause damage to your PC. Subsequently, it can fix any broken elements or replace them with an updated equivalent from its extensive database. SPONSORED

7. Install Windows Installer Redistributable

8. Delete the duplicated msiexec file

After doing that, you just need to go to the Services window and restart the Windows Installer service. This is a simple solution, but it might work for you, so be sure to try it out. In case you’re not familiar, uninstaller software is an application that can remove any application from your PC. In addition to removing applications, these tools will also remove all files and registry entries associated with the application you want to remove. There are many options available, you can certainly find the best uninstaller software that fits your budget and specific needs.

9. Change Remote Procedure Call service settings

How can I fix Windows Installer Service could not be accessed on Windows 11?

Reset Windows Installer service. Check if the Windows Installer service is enabled or not. Delete the old version of the software. Reset your Windows PC. Perform a clean install. Install the latest Windows Installer Redistributable.

Can I disable Windows Installer?

Windows Installer Service could not be accessed error messages can create a lot of problems, but we hope that some of our solutions were helpful to you. If you have any more questions or suggestions, feel free to leave them in the comments section below.

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