MSI Error 1721: ‘A program required for this install to complete could not be run.’ during installation/uninstallation
Windows Event Log Message :
“Error 1721: There is a problem with this Windows Installer package. A script required for this install to complete could not be run. Contact your support personnel or package vendor.”
Solution:
This Error indicates trouble with the Windows Installer’s registration status inside the Operating System.
The Windows Installer program must be re-registered for functionality:
- Click Start, click Run, type MSIEXEC /UNREGISTER, and then click OK. Even if you do this correctly, it may look like nothing occurs.
- Click Start, click Run, type MSIEXEC /REGSERVER, and then click OK. Even if you do this correctly, it may look like nothing occurs, or you may briefly see an hourglass.
- Try the installation once more
CAUSE
In some instances, the Windows Installer can become unregistered and needs to be re-registered for installations to function