- Error 1720 message appears when a problem occurs with the Windows Installer software. This software helps you install or remove software from your computer.
- Re-registering the Windows Installer software can help solve the problem. To do this, click the "Start" button and then type "Msiexec/unregister" in the search bar. Press "Enter" on your keyboard when done. When the command box opens, type "Msiexec/regserver" to re-register the software. This will help remove the error message so you can install or uninstall third-party software to your computer.
- Make sure you are signed into the computer as the system's administrator. If you are not, you may not have the ability to add or remove programs, causing the error message.
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