Did you try both AutoStreamers, the one that was a zip file and the other that you installed normally?
One other thing to try. Right click the AutoStreamer exe file and select Run as Administrator.
If the above still does not work then download nlite here and install it. I just installed on a Windows 7 computer and it installed correctly. Run nlite. It's similar to Autostreamer. It will ask for the Windows CD source. Click on the Service Pack button and browse to the SP3 file.
Here is a step by step guide of nlite. You are only concerned with the Service Pack button, none of the others.