If installing Wirecast (a great live streaming application by Telestream) and you run across this little error upon starting up for the first time:

Wirecast was unable to start
Unable to find the QuickTime plug-in. Please reinstall Wirecast.

I would not recommend reinstalling Wirecast but simply downloading and installing QuickTime:

1. Visit www.apple.com/quicktime/download/ and download
2. Run Setup
3. I would uncheck the boxes on this dialog:
   
4. And at the end of the install I would also click “No Thanks”:
   

You should now be able to run Wirecast without the QuickTime error. This applied to Wirecast 5 (5.0.3) and Windows 7 x64.

As a side note, I’ve been experimenting with DaCast streaming provider, so far seems to work well.