Windows Service Master is a tiny (120KB) portable tool which displays useful information about the services and drivers installed on a Windows PC. If you’re running Vista or Windows 7 then you must launch the program as an Administrator (right-click the executable, select Run As Administrator), but then you’ll immediately see a list of installed services and drivers, with details including their full display names, short service names, program type (service or device driver) and whether it’s running or stopped.
[advt]The report is easily filterable, so for instance if you check only the “Show active (running) services” box then everything else will disappear. If you need to know more about a service, or perhaps would like to tweak it, right-clicking the service and selecting Open Registry Key will open REGEDIT at the key containing all its settings. Which can be useful, though be careful: changing a driver or service setting inappropriately may cripple your PC to the point where it won’t boot, not even in Safe Mode.