UAC plugin has trouble with mutex
 

I added a mutex to our installs. It would appear that the UAC plugin can not spawn another process because of the mutex being the same; i.e. - an instance of the install is already running message. This is just a FYI note. I suspect I could do something to fix that if we decide to use the plugin. Right now, I am just looking for a way to do any update install as a limited account user after the product has already been installed.

As it turns out. I can use the Access Control plug-in to get the read write access to the installed files. This will allow me to make the install product directory read write accessible by all users. I tested this and it worked great. The limited account user is able to do an update install just fine.

If you wanted to use the UAC plugin AND a mutex, you would have to create the mutex AFTER you called the uac plugin in .onInit