Just dropping a little note because of a problem I had (and solved), so that others might not have the same problem:
GTS wouldn't start because port 80 was supposedly being used, netstat gave me PID4, and then tasklist gave me SYSTEM (not very useful).
Long story short, it was World Wide Web Publishing Service (W3SVC) that was occupying the port. Disabled the service and the GTS started - no problem.
While you may not be hosting any webpages or anything, you may not notice that service is running in the background (possibly the computer is second-hand and came with the OS installed already and the service was running, or you simply turned it on at some point by accident somehow), so might be worth checking for.
