We have a few Samsung NC10 netbooks (though the problem is with XP) for the kids to use and just had one that had not been shut down and just had the lid closed, normally not a problem as it just needs the user details entering and unlocking but this time the boxes to enter the unlock details were greyed out so could not unlock it! The domain box was OK and I could select the domain or local machine name but still could not enter any login details. Ended up using holding down the power button to shut down and to get back in. Never had this before so the question is what caused it and how do I get it unlocked correctly?