Hi, I ve been experiencing the following problem since I installed the service pack 1 RC on windows vista ultimate: Certain services fail to start, though when I look in services.msc it appears as they are "starting" i.e. pending, though I cannot start or stop them. These services are : -Windows Audio Endpoint Builder, status: starting -> this causing also the WindowsAudio service not to start because this service is depended upon windows audio endpoint builder. I changed the dependencies in Windows Audio service to fix that problem temporarily. -Windows Image Aquisition (WIA) , status: starting -Volume SHadow Copy, status: stopping, so I cannot create a restore point This does not happen after every time I restart, but on 75% of the occasions. Also, USB devices dont work and if I connect an external USB drive for example, it cannot start (it doesnt get a drive letter assigned). I also cannot create a restore point, and when I shut down the computer, it doesnt turn off after windows log off, but I guess this is because there are still those services pending.Finally, there are delays on some actions, the pc hangs for a while before executing programs, especially through the start menu, and frequently windws explorer crashes because of it. I suspect everything has something to do with those services. Any ideas? Thanks!