It reads "Tip: If you are asking for help to troubleshoot a computer-related problem, please be sure to include all the necessary information (ie: operating system, model number, hardware, software, etc) that will help others identify your problem for a speedy resolution."
Plus tell what you are trying to install, and the quoted "error message".
Many applications will have a help web site and may offer a fix, but your post is a little light.
Bob
I keep getting windows installer not working message. I have no clue what to do
Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic