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When you try to remove programs by using Add or Remove Programs in Microsoft Windows XP, you may receive the following error message:
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
To resolve this issue, perform the steps in the "Reregister the Windows Installer service" section. If you experience the issue after you perform these steps, you may also have to perform the steps in the "Run System File Checker" section.
Reregister the Windows Installer serviceThe Windows Installer service manages the installation and removal of programs. The service applies a set of centrally defined setup rules during the installation process. These setup rules define the installation and configuration of the installed program. Windows Installer uses the Microsoft installation engine to install or remove programs. If the registration of the Microsoft installation engine is corrupted, you may not be able to remove programs that you have installed by using Windows Installer. In that case, you have to unregister and reregister the Windows Installer service. To do this, follow these steps:
Run System File CheckerThe System File Checker (Sfc.exe) utility is used for scanning protected operating system files to verify their version and integrity. If System File Checker detects any operating system file with the incorrect file version, it replaces the corrupted file with a file that has the correct version from the Windows installation source files.
To use System File Checker, follow these steps: