Im not sure if the SC command exists in Vista like it does in xp... And vista has some issues with security and the whole cancel/allow thing.. BUT, You may be able to shell out and SC STOP "Service Name" or NET STOP "Service name" At the start of your application.then after then program has ended restart the service. Since its stopping right away you may need to run the game from a .bat file and kill the service before executing the main game exe. Just my two cents, as I fear updates for blitz to help with vista are not going to happen, and Microsoft officially stopped selling xp so, we're in for some pain as blitz users in the near future.