Thanks for the suggestions Jasmine!
I tried updating my firmware, and the Surface Diagnostic Toolkit didn't detect any errors for me.
Unfortunately, the problem is still persisting on my machine. I have the 1st gen SurfaceBook with Performance Base.
I also noticed that this only happens when I'm watching videos on YouTube. (Weird huh?)
If it's useful, I use Google Chrome to browse. Also, this is very definitely linked to the combo of Youtube + using Adobe programs on my machine. I've done exhaustive testing, and this combo is the only one that results in freezing for me. (Tested with Photoshop
and Illustrator specifically)
All of the noted behaviors that the OP listed apply to me as well. One interesting tidbit is that if I'm plugged in when the freezing begins, unplugging from a power source always helps to buy me some time before my computer fully freezes. (time to save
my work and exit programs properly) I'm not sure why, but disconnecting my power cable seems to snap Windows out of it for a few precious seconds.
Thanks in advance for reading this. If there's another place you recommend that I submit bugs too, just let me know and I'll create a formal ticket for Microsoft.