Dell crashes and restarts upon sle...

I'm not a big fan of using hibernate or standby, I've seen it cause too many problems, such as the one you're having. I shut my machine down when I'm done, or let it run if I'm coming back within a reasonable amount of time. I've also seen hibernation or standby create operating system errors or glitches, and premature hard drive failure. If the machine is working properly other than hibernation/standby you should shut the hibernation off and just shut the machine down when not in use. If you're getting this error when using the power button to turn off the computer, then the operating system has glitched or is corrupt and needs to be reistalled. If you need anymore help with this let me know.