The 1721 error is a common issue for millions of Windows computers throughout the World. It shows mostly when you are trying to install a particular type of software onto your system, and is caused by the Windows Installer program either being corrupted or damaged. To ensure there are no problems caused by the 1721 error, you should follow the steps in this tutorial to ensure that this error does not cause any further issues for your system.
This error will often show in this format:
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 personal or package vendor.
If you’re seeing this error, it generally means there’s a problem with Windows Installer which means that you should look at fixing any problems the installer may have, as well as repairing any system errors your computer might be suffering from.
The first step to resolving the 1721 error is to unregister and then re-register the Windows Installer program. This will basically remove the tool from your computer and then allow Windows to read it properly again, boosting its speed and reliability as a result. Because Windows installer is a crucial part of your system, you can’t actually uninstall it… but you can unregister it and then re-register it to cure many of the problems that this component has. You can so this by loading up “cmd.exe” and then using the “msiexec” command. You should also use the “Windows Installer Cleanup Utility” on your system – which is free software tool developed by Microsoft to allow your computer to fix the various errors and problems that will continually cause your system to show the 1721 error. You can use this tool to quickly fix the majority of issues that Windows computers develop when installing software.
The second step to fixing this error is to use a “registry cleaner” program to repair any of the damaged and corrupt parts of your system. A registry cleaner is a software program which will basically scan through your PC and repair the errors your computer has inside the “Registry Database”. This database is a central storage facility for all your settings and options on your PC, and is what Windows uses to help your computer ‘remember’ the settings and files it has. Unfortunately, the registry is continually causing a lot of problems for your system. Registry errors are a big problem for many Windows computers, but are very easy to fix – you basically just need to download a registry cleaner from the Internet and then allow it to fix the various errors on your PC. This should cure the 1721 error on your system for good.
Source by James Henry Johnson