What is Windows Installer?
Windows Installer manages how other programs are installed and uninstalled on your computer. Software publishers can use Windows Installer to help make the installation or uninstallation process more consistent from one program to another.
In earlier versions of Windows, it might have been necessary to re-register the Windows Installer files in the registry if those files became damaged or corrupt. In this version of Windows, damaged system files needed by Windows Installer can be repaired automatically.
If Windows Installer does not work correctly, open Problem Reports and Solutions to see if a solution is available.
Open Problem Reports and Solutions by clicking the Start button , clicking Control Panel, clicking System and Maintenance, and then clicking Problem Reports and Solutions.