We've had a few of these computers come by us and every single one of them hasn't network booted correctly. We hit F12 on startup and goes into the regular boot-order and loads the windows image after we press enter. And when you would expect the Microsoft Deployment Tool - windows to show up it briefly shows the HP Sure start boot screen and then it goes black and nothing happens. We've tried disabling all the safety features but no luck. Updating the BIOS doesn't make any difference. But for example any other HP laptop that we do the same procedure with works just fine. Any ideas?