Whenever I close the lid of my Macbook or have it sleep manually via the charms bar it sleeps but never wakes up again. It's just a plain black screen but the laptop still has power because I have a USB mouse plugged in and the light for the laser turns on if I press the space button on the keyboard but the laptop screen stays black until I hard restart. I have installed all the Windows updates, updated to the latest Nvidia Display drivers, and have the latest Boot Camp 5 drivers. Is there any way I can fix this? Thanks. It's very annoying not being able to set the mac to sleep. I use this feature constantly so...