What Does 'windows Installer Is Not Correctly Installed Mean",,this Is From From Compac Presario 2100 Computer.....lap

What are you trying to install?

Do you have SP2 and all subsequent Critical Updates?

Among them is the current Windows Installer application.

If you are having problems installing a particular program you can try the Installer cleanup:

http://support.microsoft.com/default...b;en-us;290301