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Here's how to Windows Installer not working properly in Windows.

Windows Installer is a service that manages the installation, uninstallation, and updating of programs and features in Windows. Windows Installer not working properly in Windows can cause various problems, such as error messages, incomplete or failed installations or uninstallations, or inability to access or modify programs and features. To fix Windows Installer not working properly in Windows, you can try the following methods:

- Run the Program Install and Uninstall Troubleshooter. This is an automated tool that can repair issues that block program installation or removal because of corrupted registry keys or other problems. To run this troubleshooter, follow these steps:

- Download the troubleshooter from this link and save it to your computer.
- Run the troubleshooter and follow the on-screen instructions to diagnose and fix any issues with Windows Installer.
- Restart your computer and try to install or uninstall your program again.

- Restart or re-register the Windows Installer service. Sometimes, the Windows Installer service may stop running or get corrupted, preventing it from working properly. To restart or re-register the Windows Installer service, follow these steps:

- Press Windows + R to open the Run command, type services.msc and hit Enter.
- In the Services window, find and right-click on Windows Installer and select Properties.
- In the General tab, check the Service status. If it is Stopped, click Start to restart it. If it is Running, click Stop and then Start to refresh it.
- In the Startup type drop-down menu, select Automatic and click OK to save the changes.
- Press Windows + R again to open the Run command, type msiexec /unregister and hit Enter. This will unregister the Windows Installer service.
- Press Windows + R again to open the Run command, type msiexec /regserver and hit Enter. This will re-register the Windows Installer service.
- Restart your computer and try to install or uninstall your program again.

- Update or reinstall the Windows Installer service. Sometimes, updating or reinstalling the Windows Installer service can help resolve any issues or errors with it. To update or reinstall the Windows Installer service, follow these steps:

- Go to this link and download the latest version of Windows Installer for your version of Windows.
- Save the file to your computer and run it as an administrator.
- Follow the on-screen instructions to install or update the Windows Installer service.
- Restart your computer and try to install or uninstall your program again.

i. Windows Installer error 1719 occurs when the Windows Installer service cannot be accessed. This can happen for a number of reasons, including:

* The Windows Installer service is disabled.
* The Windows Installer service is not registered properly.
* The Windows Installer package is corrupt.
* There is a problem with the system files.

To fix Windows Installer error 1719, you can try the following:

1. Restart your computer.
2. Run the Program Install and Uninstall Troubleshooter.
3. Restart the Windows Installer service.
4. Repair the problematic app.
5. Update Windows.
6. Re-register the Windows Installer.

If you are still having problems after trying these steps, you can contact Microsoft support for help.

Here are some more detailed instructions for each of the steps above:

1. To restart your computer, click the Start button and select "Restart".
2. To run the Program Install and Uninstall Troubleshooter, click the Start button and type "troubleshoot". Select "Troubleshoot common computer problems" and then select "Programs and features". Click "Advanced" and then select "Run the troubleshooter".
3. To restart the Windows Installer service, open the Services window by pressing Windows key + R and typing "services.msc". In the Services window, find the Windows Installer service and double-click it. In the Properties window, set the Startup type to "Automatic" and then click "Start".
4. To repair a problematic app, right-click the app's shortcut and select "Repair".
5. To update Windows, click the Start button and type "update". Select "Windows Update" and then click "Check for updates".
6. To re-register the Windows Installer, open the Command Prompt as an administrator. Type the following command and press Enter:

```
msiexec /unregister
msiexec /regserver
```

This will re-register the Windows Installer service.