How to fix MSI 1721 There is a problem with your installer

Occasionally, a problem can occur with the Microsoft Windows installer resulting in a 1721 Error when attempting to install CompanionLink.

Step #2

Use the steps below to resolve the issue:

1. In the Windows search bar, type "Run" and select the Run app
2. Type "MSIEXEC /UNREGISTER" > click OK.
3. Open the Run app again, type "MSIEXEC /REGSERVER", > click OK.
4. Install CompanionLink again

Alternatively, you can download and run the application from the link below

https://support.microsoft.com/en-us/help/17588/fix-problems-that-block-programs-from-being-installed-or-removed