How to Fix Windows Installer Service Could Not Be Accessed Error

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Summary: In this article, you will get to know how to fix Windows installer service could not be accessed error and recover essential data using Bitwar Data Recovery Software.

“Just a few days back I upgraded to Windows 10; I was using Windows 7 at the moment. But after the upgrade, every time I am trying to download a new program, Windows installer service could not be accessed error message keeps appearing. Not just that, the same message appears if I try to uninstall a program. I have no idea why this keeps happening to me.”

Fix Windows Installer Service Could Not Be Accessed Error

Windows installer service could not be accessed actually an element from Microsoft. It is generally used for installing any program, maintenance and also for the uninstallation. So, this is the reason you are getting the said error while installing and uninstalling a program. Although, while you are getting this notification you won’t be able to install or uninstall any software, there are ways fix the error so that, you may not come across it next time you install a program.

Reasons Behind the Error

Windows installer service could not be accessed; this error occurs while installing or uninstalling a program as the Windows Installer has not been installed properly. It is also true that, if the Windows Installer files or folders are damaged or missing, the error could still appear. Well, the failure could also be associated with Registry Permissions too.

Ways to Fix Windows Installer Service Could Not Be Accessed

After considering all the scenarios, we have detailed 4 workable solutions that can effectively get rid of Windows installer service could not be accessed error. Let’s have a look;

Solution 1: Uninstall the Older Version of the Program

If the error is occurring during the installation of specific software and you already have an older version of that same software installed on your computer, then you could uninstall that older version and try to install the latest version again.

Uninstall Chrome

Sometimes, the error could get caused as you haven’t removed the older version of a program that you are trying to install. So, removing it beforehand could fix the issue.

Solution 2: Make Sure that the Installer Service is Running

You can also check if the Installer Service is running correctly. If it is not, the error could appear on the screen. The steps are detailed below;

Step1: So, open your computer and click on “Start”.

Step2: Go to “Run” and click on it; the dialogue box will appear.

Step3: In the dialogue box, type “msconfig” and then click “OK” to execute.

Step4: The “System Configuration” panel will appear on the screen, click on the “Services” tab. In the list, click on the checkbox beside “Windows Installer”.

Windows Installer

Step5: Now, click “OK” and then click “Apply”. Finally, click “Restart” to reboot your computer.

Another Try:

If Windows Installer is stopped, you can start it again by following these steps:

Step1: Type Services.msc after opening Run dialogue box using Win logo key + R.

Step2: Now, look for Windows Installer service, and then click on Start from the left panel.

Start Windows Installer Service

Try again to check whether Windows installer service could not be accessed error persisted after rebooting the computer.

Solution 3: Register Microsoft Installer Service Again

Another solution for you is to register Microsoft Installer Service again. This is a useful and effective method that could fix Windows installer service could not be accessed error.

Step1: Open your computer and launch cmd by pressing “Windows + R” keys, then hit “Enter” to execute.

Step2: The command Prompt will be launched. In the Command Prompt, you need to type the following commands and hit “Enter” to execute.

%windir%\system32\msiexec.exe /unregister

%windir%\system32\msiexec.exe /regserver

%windir%\syswow64\msiexec.exe /unregister

%windir%\syswow64\msiexec.exe /regserver

Register Microsoft Installer Service Again

All the commands above are listed for 64-bit Windows.  But if you are using 32-bit, then type and execute the following commands,

msiexec /unregister

msiexec /regserver

Step3: After executing the commands, you can exit the Command Prompt by typing “Exit”.

After that, you have to reboot your computer. Now, you have successfully registered Windows Installer Service again, but you must check if the solution has worked.

Solution 4: Install Windows Installer Again

If all else fails, and Windows installer service could not be accessed error is still appearing on your screen; your final way to rectify the situation would be to reinstall Windows Installer.

Step1: Open your computer and press “Windows +R” and type cmd in the dialogue box and then press “Enter” to execute”.

Step2: The Command Prompt will be launched. In the Command Prompt, you have to type the commands listed below and hit “Enter”.

Install Windows Installer Again

First, you need to enter to system 32 folder using this command: cd %windir% \system32, and then type this command first: ren msi.dll msi.old, and then: ren msiexec.exe msiexec.old, Lastly: ren msihnd.dll msihnd.old

Step3: Now, type “Exit” to close the Command Prompt and hit “Enter”.

Step4: After that reboot, your PC and update the Windows Installer. You have to visit the official Microsoft website, then download and install the program.

After the Windows Installer is installed successfully, you can restart your PC, and you will be able to install or uninstall programs as usual.

Extra Tip: Recover Data After Fixing the Error

After fixing Windows installer service could not be accessed error, if you might have lost data due to this error or any other data loss scenarios, then you will be able to recover those lost files easily using Bitwar Data Recovery Software.

Step1: Download and install Bitwar Data Recovery from our official website.

Download for PCDownload for Mac

Step2: After that, launch the program on your computer, and you have to select the partition where the deleted files were located and click “Next” to proceed.

Select the drive 6.49

Step3: Now, you have to choose a recovery ode and then choose the data type for the lost file recovery. After selection click “Scan”.

Select Video 6.49

Step4: After previewing the scanned data, click on the “Recover” button at the bottom of the panel and save the data to another partition or drive.

Video Preview

Notes: Just be sure not to restore those files at the same partition as they were before they were erased. It could overwrite the files and erase them permanently.

Conclusion

The Windows installer service could not be accessed error is a not a very common issue among Windows 10 user. Still, if it occurs, you will not be able to install or uninstall any program on your computer. But recovery from this issue is effortless, we have discussed 4 effective ways to achieve that, along with their detailed steps.

But after a successful fix, if you have accidentally deleted a few files, then you will be able to get them back very easily with Bitwar Data Recovery.

Read More

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