I don't trouble shoot. I reload the IT issued image.
You could use system restore which is exactly what we use this for. When it fails today but worked yesterday.
On our network I have a dell lattitude e4300 laptop and when I plug it into it's docking station it shuts down. On the network where I work we have many of the dell e4300 laptops that all work fine. It's done this from day one of owning the laptop. This seems like a power setting or something along those lines. So, I looked in the control pannel and I couldn't find anything that fixed the issue. I can't think of another reason that docking the laptop would force a shutdown.
Any help is greatly appreciated
Thanks a lot!