Surface Pro 2017 turning off or hibernating randomly!!!

I am experiencing this as well. Suface Pro i5/8g/256g. On-battery; on wifi. Sometimes surfing in the internet with edge and sometimes with excel. Probably all of the times it happened was after 30 min usage. No accessories at all.

thanks in advance,

For some reason my new Surface is shutting off randomly. I check the setting and a few other things but it's still randomly turns off without warning. I'm losing some of my school work because of it. Is anyone else having this problem?

Having same problem.  Purchased on July 5th.  i7/8/256 model.   Has randomly hibernated 4 times while using since the purchase. I didn't lose any work, since I was able to wake up and pick up where I left off.  I have had the issue with the keyboard attached and without it attached, in tablet mode, using the pen.

1. you could post a filtered, saved evtx to a public folder on OneDrive and share the LINK to that file here in the forum since attachments are not supported here.
2. you could take a screen shot of the event and post that here. Many have done this already.
3. with respect to your comment " (According to the entries on my event viewer, my surface pro went into hibernation when it experienced a "critical thermal event." Note that the alleged increase in temperature (or the defect in the sensor that made the computer think the temp went up) occurred at night when the computer was idle. There is no reason for it to be overheating.)  " - was it plugged in or on battery? The reason I ask is that nearly all the complaints here are on battery only and don't include a thermal event. So I would wonder if you have a different issue. The events right before and including the thermal shutdown would be interesting as well.

Is there a mechanism on these community boards for us to attach a document where each person could paste the information from their event viewer showing what was happening when the computer went into hibernation? While the unexpected and inappropriate hibernation is common to everyone here, it appears to arise in a variety of circumstances -- some while on battery only, some while plugged in; some while playing games, some while the computer is doing nothing; etc. (According to the entries on my event viewer, my surface pro went into hibernation when it experienced a "critical thermal event." Note that the alleged increase in temperature (or the defect in the sensor that made the computer think the temp went up) occurred at night when the computer was idle. There is no reason for it to be overheating.) It might be helpful to have a single source where all of the circumstances under which the computer went into hibernation are listed in a single place. 

For folks who do not know about the event viewer, it is a log of various things your computer is doing. You can access the event viewer by right clicking on the start button and then double clicking on the "event viewer." On the left hand side, click on and expand "Windows Logs." Then, again on the left hand side, click on "System." This is where you will find the log of events related to your hibernation. On the right hand side, you can filter events to show errors, critical events or warnings. Anyone who posts here about their computer going into hibernation should look at the event viewer and include that information in their post.