Oh no problem.
Open up the control panel. Then go to administrative tools, then open up the event viewer.
You'll have the options on the left, open them all up until you find System and then click that.
In the middle/right, you'll see a bunch of event entries. Start going down the list by time until you find something that makes "sense" in the description about the restart. It's kind of educated guesswork but there may be a clue in it. If you're having no luck finding any clues, there's a way to export that log and you could send it to me in email to take a look.