How to disable a service for goodThe Stop button temporarily puts a service out of commission. But it's likely to restart the next time you start your system, unless you specifically disable it. Use the Disable choice on the Startup Type menu, shown here, to ensure that a service won't run at all. The Manual option keeps a service turned off but allows it to start if it's needed.
For a detailed discussion of when and how to manage services, see Fixing Windows Vista, Part 4: Get smart about services