What Is Error 1721?
This is an error commonly witnessed when you try to uninstall a program using the "Add or Remove Programs" in Microsoft
Windows XP. The message itself will read: "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."
Resolution #1: Reregistering the
Windows Installer service
It is known that if the Microsoft installation engine malfunctions or is internally corrupted, there is a possibly that you will not be able to remove
programs that you used the Windows Installer, the service that administers the installation and configuration of programs, to install with. Thus, in the case of error 1721, it is necessary to unregister and then reregister the Windows Installer service to fix the corrupted parts of the engine. This can be accomplished through the Safe Mode by:
- Enter your computer in Safe Mode by:
- Restarting the computer and pressing F8 after the BIOS information is shown
- Select Safe Mode and Enter
- Select your computer and Enter
- Log on as the local administrator
- Open up the command prompt by clicking Start, Run, and then typing cmd.exe and Ok
- At the command prompt, first unregister the service by typing msiexec /unregister and then hitting Enter
- Reregister the service by typing msiexec /regserver and then hitting Enter
- Type Exit to exit the command prompt safely
- Try to remove the program once again using Add or Remove Programs
I hope this helps you out. Thanks
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