After installed Avast and scanned my computer (OS : Vista Home Edition) , all my services didn't run in the start up, and all the start up application can't run. The problem is many applications can't run normally, for exam : Windows Media can't play a movie ( It only has the sound and can't display the screen ), windows aero doesn't work.... I can't find anywhere to open the services that had been blocked by Avast. How Can I Do with It ??