Error+1721+When+Installing+New+Software

When you try to remove programs from your system using the Programs and Features control panel, you may see the following error:
 * Error 1721 When Installing New Software **

//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.//
 * //Error 1721//**//.//

It is caused by a corrupt system file used by the Windows Installer tool, which many applications used to install or uninstall themselves from your system.

To resolve this error message you need to replace the corrupt system file with a fresh copy, using SFC:


 * 1) Click **Start** > **All Programs** > **Accessories**, right-click on **Command** **Prompt** and click **Run as administrator**.
 * 2) If prompted, click **Yes** to agree to the run the command prompt at a higher security level.
 * 3) At the command prompt, type without the quotes “**SFC /SCANNOW “**and press [**Enter**].
 * 4) The System File Checker will scan your system files and replace any corrupt ones that it finds with shadow copies of the original files on your hard drive.
 * 5) Do not forget to type EXIT when finished as this closes Dos correctly