I have a Latitude E6440 running Windows 7 64-bit. Ever since I bought it, I was not able to put the machine into hibernation or put it to sleep. When putting it to sleep it simply reboots and I get a windows error message "Windows has recovered from an unexpected shutdown." It lists the values below under "Problem details".
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 2057
Additional information about the problem:
OS Version: 6_1_7601
Service Pack: 1_0
Due to this I always have to shutdown my laptop. Can't just put is to sleep.