How do you fix there is a problem with this Windows Installer package a program required for this install to complete could not be run?

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• [3+ Ways] How to Fix Error 1721 Installer Problem Windows 10/11?

By Helen | Follow | Last Updated March 04, 2022

This article described by MiniTool Software mainly discusses the Windows Installer error 1721 as well as its solutions. Generally, you can try to restart/update the service, run the target program in compatible mode, troubleshoot installation and uninstallation, etc. to fix the issue.

Error 1721. There is a problem with this Windows installer package. A program required for this install to complete could not be run. Contact your support personnel or package vendor.

Have you ever encountered such a Windows installation issue? How did you fix it? If you are still suffering from this bug, just refer to the following methods to deal with it!

The following methods apply to Windows 11/10/8.1/8/7.

Solution 1. Restart Windows Installer Service

Since this problem is related to the Windows installer, you can try to solve it by restarting its service.

1. Open Windows Run command.
2. Input msc and click OK to open the Services tool.
3. Scroll down to find the Windows Installer Right-click on it and click Stop.
4. Then, right-click on Windows Installer again and select Start.

Besides, make sure both Remote Procedure Call and DCOM Server Process Launcher services should be started and set to automatic. Just double-click to launch Windows Installer properties. Go to its Dependencies tab to see whether Remote Procedure Call and DCOM Server Process Launcher is listed there or not.

Sometimes, upgrading your Windows Installer to the latest version is the fix.

Solution 2. Install App in Compatibility Mode

The error 1721 may be caused due to the incompatibility of the target application and current Windows 11 or 10. If so, just try the below steps to handle the problem.

1. Right-click on the setup file of the software and choose Properties.
2. Navigate to the Compatibility tab.
3. Check Run this program in compatibility mode and select Windows 8 in the dropdown menu.
4. Click Apply > OK to save the changes.

Solution 3. Run Program Install and Uninstall Troubleshooter (for Windows 10)

If you come across error 1721 Windows 10 while trying to install Windows programs, you can rely on Program Install and Uninstall troubleshooter to fix it. The troubleshooter assists you to repair issues automatically when you are blocked from app installation or uninstallation. It also fixes corrupted registry keys.

1. Download Program Install and Uninstall troubleshooter.

2. Double-click the downloaded meta.diagcab file to open the Program Install and Uninstall troubleshooter.

3. Click on the Advanced option to Apply repairs automatically and click Next.

4. Select Installing or Uninstalling.

5. Select the program you are trying to install but fail. If you do not see your program, select Not Listed.

6. Then, make your decision, either uninstall the programmatic program or try other fixes.

If a program is not listed in the uninstall options, you will be asked for that program’s product code. To access the code, you’ll need a tool for reading MSI files for its properties. The Program Install and Uninstall troubleshooter can help you fix the following issues:

• Corrupted registry keys on the 64-bit operating system.
• Corrupted registry keys that control the update data.
• Unable to install new programs.
• Unable to completely uninstall or update existing programs.
• Unable to uninstall programs via Control Panel.

If you encounter error 1721 Windows installer when installing apps from Microsoft Store, you can try this way to solve the problem.

1. Sign in to your Microsoft account.
2. Update Windows to the latest version.
3. Make sure the target app applies to Windows 10/11.
4. Update your Microsoft Store.
5. If you are trying to install a game, just troubleshoot the game installation.
6. Repair or reset your app.
7. Troubleshoot Windows Store apps in Settings.

Other Windows Installer Error 1721 Fixes

Besides, there are some other ways that may solve the error.

• In computer safe mode, run msiexec /unregister in Run command to unregister Windows Installer and run msiexec /regserver to re-register Windows Installer. Then, restart the PC.
• Temporarily disable any firewall or antivirus during the installation of the target program. Or, configure the firewall and security software to allow the installation.
• Check if any malware or virus (including entry or add-on) installed on your computer prevent the installation.
• Remove any damaged files with Windows Installer cleanup utility.
• Use a registry cleanup tool to delete corrupted registry files.
• Type net localgroup to see whether there is the “Power Users” item in the list. If not, type net localgroup "Power Users" /add to add Power Users.
• Run SFC scan.
• Perform a system restore.

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About The Author

Position: Columnist

Graduate from university in 2014 and step in work as a tech editor the same year. Writings involve mainly in hard disk management and computer data backup and recovery. Through the years of diving deep in computer technology, Helen has successfully helped thousands of users fixed their annoying problems.

Personally, Helen loves poetry, sci-fi movies, sport and travel. And, she believes that all her life is the best arrangement from god.