My organization previously allowed its employees to hibernate their devices(Start>Power>Hibernate). Sometime later, the 'Hibernate' option disappeared from the Start menu. Some employees started using
shutdown /h to hibernate their PCs. It worked for a few weeks. Later, running the same command through Windows command prompt threw an error that "Hibernate feature has been disabled on this machine".
Obviously, this was a step taken by IT team for some reason which I fail to understand. First they removed the option from Start menu, later they must've realized that people have started hibernating the PCs from the command prompt, and then disabled that as well.
My question is, how does enabling hibernate pose a security threat? Or could it have some other reason?
If it helps, we have Windows 7 Enterprise PCs, hard drive encrypted by Bitlocker, and we are allowed to put the PC in Sleep mode.
Also, I guess the hard drive is not encrypted when the PC is in sleep mode, but all the data is encrypted when it is in hibernate mode. Please correct me if I'm wrong.
EDIT: Well, my question's domain was not limited to Bitlocker encryption of hard drive. It was kind of a, more general question. I would be interested to know if there are any other threats in hibernate mode, apart from encryption. Also, if encryption would have been an issue, then obviously putting the machine in Sleep mode could be dangerous as well. But they do allow Sleep mode...