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.

Source: http://www.nilebits.com/blog/2008/12/windows-installer-service-unavailable/

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