Wednesday, December 17, 2008

The Windows Installer Service is unavailable!

I got this error when I was trying to install any application, I didn't know if this error is a bug in Windows Vista Ultimate or a bug in Windows Installer.
However finally I got the solution after days of searching Google to get any solution for this error but I didn't find any.

What I have discovered so far is an application or registry entry I don't know, it starts the Windows installer process not the service and keeps it running so when you try to install it gives you this error:

"Another application may be running setup. Finish any installation in progress, or restart your computer and re-run the setup"

It feels that you are running another setup.

To be able to run your setup just ends the Windows Installer Process from the Task Manager.


  1. Hi sir,
    I think that you should try to use the task manger, to end and stop the service or you could terminate the process of the windows installer...

  2. Thanks a million!
    A simple solution (really simple), but I hadn't thought of it myself.

    It solved a huge problem for me, and spared me a complete re-install of the machine.

  3. Hi all
    Just found this site and thought it might be useful to chat to people who are trying to accomplish the same as me!

    I spend too much of my life on the internet and look forward to chatting to you all and picking up and sharing ideas along the way!

    Waiting your reply..