What is “Error 1719. Windows Installer service could not be accessed”

Windows Installer service could not be accessed had been quite a popular error stumbled on Windows 7 and 8 since 2010. The message popped unexpectedly while trying to install or delete a program in Windows. This prevented users from running adequate PC experience and installing software they like. There are two types of messages users can see while facing the error.

The Windows Installer Service could not be accessed. This can occur if the Windows Installer is not correctly installed. Contact your support personnel for assistance.


Error 1719. Windows Installer Service could not be accessed. Contact your support personnel to verify that it is properly registered and enabled.

Unfortunately, the same error has been transported to Windows 10 with the same root of appearance. The main problem why you receive this error lies in the badly configured or corrupted Windows Installer service, which is responsible for the proper installation and deletion of apps. Overall, the majority of older solutions work with Windows 10 only differing in their steps. If you are the one constantly facing this problem, follow our tutorial below.

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1. Make sure Windows Installer is working

The first and easiest method to try is checking whether Windows Installers runs or not. If you have Windows Installer disabled for some reason, the service will be unable to execute its function and lead to problems with the installation/uninstallation of the software. Therefore, check if this is the case using these steps below:

  1. Press Windows Key + R buttons at the same time, copy-paste services.msc and push Enter.
  2. Now you can see the whole list of services running on your PC. Find a service called Windows Installer.
  3. Right-click on it and choose Properties. Then change value next to Startup type to Manual.
  4. Click Apply and choose Start if the service is stopped.
  5. Finally, close the window and try to install or uninstall programs again.

2. Check integrity of system files

It is quite common to see corrupted or absent files being part of the reason. Error with the Windows Installer service can be related to that reason as well. This is why it is worth checking whether your file system is full and not damaged. Below, we are going to use both SFC (System File Checker) and DISM (Deployment Image Servicing and Management), which will detect and restore absent components, if any. Make sure to use both of these scans using the sequence below (they can have a different impact on resolving the issue):


  1. Open Command Prompt by typing cmd into the searching box next to the Start Menu button.
  2. Right-click on Command Prompt and choose Run as administrator.
  3. Once the console is opened, type the sfc /scannow command and click Enter.
  4. When the fixing process is done, restart your computer.


  1. Open Command Prompt as we did in the previous step.
  2. Copy and paste this command DISM.exe /Online /Cleanup-image /Restorehealth.
  3. Click Enter and wait until Windows ends the scanning and fixing.
  4. Once done, restart your PC and install the update again.

3. Reset Windows Installer service

To avoid any configuration changes or damage, you can re-register the entire Windows Installer service using Command Prompt. Said differently, you will roll this service back to its factory settings. You will have to enter a couple of commands, which differ depending on what bit system you use (32-bit or 64-bit). If you are unsure what bit system you have, do the following to find this out:

  1. Open This PC, right-click on empty space under your disks and choose Properties.
  2. In this window, you will able to find your bit version next to System Type.
  3. Once you found this out, get down to executing the commands for your system type.
  4. For 32-bit version:

    1. Open Command Prompt by typing cmd into the searching box next to the Start Menu button.
    2. Right-click on Command Prompt and choose Run as administrator.
    3. Once the console has opened, insert these commands one-by-one clicking Enter after each.
    4. msiexec /unregister
      msiexec /regserver

    For 64-bit version:

    1. Open the same Command Prompt we used above.
    2. Insert these commands one-by-one clicking Enter after each. Just like we did.

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

    After successfully resetting the service, try to run the installation of software again.

    4. Configure Windows Registry manually

    Try this penultimate solution if none of the above helped you resolve the problem. This method involves crawling into Windows Registry and affecting changes to values linked with the Windows Installer service. There is a chance those values could change forcing the service to lose its stability or stop working completely. Note that you should be careful while running manipulations with Registry values. Mistakenly changing wrong values may result in problems with other segments inside of your PC.

    1. Press Windows Key + R buttons, type regedit and open it up.
    2. On the left pane, navigate through this path HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\msiserver.
    3. After clicking on msiserver, move your eyes onto the right side and look for the key named WOW64.
    4. If there is no such available, right-click on blank space and choose New > DWORD (32) to create a new value. Name it WOW64.
    5. Finally, open WOW64 and set its Value data to 0, in case it doesn’t have it yet.
    6. Also make sure Base is set to Hexadecimal.
    7. Click OK to close the window and check if you got rid of the error eventually.

    5. Reset your PC via System Restore Point

    If you did not manage to benefit from the above-listed solution, the last and radical option is to restart your system with a backup point when everything worked without problems. Some users receive new errors after some updates or manual changes that remain unnoticed and therefore hard to fix. This is why it is a good idea to use a restore point for the recovery instead. Perform the following steps:

    1. Right-click on This PC and choose Properties.
    2. In the opened window, go to System Protection and click on System Restore.
    3. Then, click Next and choose the date you remember working without a problem. You can also click on Scan for affected programs, which will show what might be changed after running a restore.
    4. When done, click Next and start the System Restore.


    We hope our solutions helped you address “Error 1719. Windows Installer service could not be accessed” and continue installing/removing software without similar problems. If you need help with other errors or difficulties on Windows and Mac operating systems, use our website to find related articles as well.

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