At random, when I travel to a new or already visited location, I'll get a familiar one tone echoing musical note and Papyrus will concurrently log *Achievement xx awarded - a winnar is you!*
As soon as I subsequently reach 12am in-game (Skyrim) time, the game will reliably crash to desktop.
I've stripped all mods from the game and it still happens, and now it's starting to happen with fresh unmodded games, after a while of progress (say, when I get somewhere along the quest to take cities for the Stormcloaks).
That one-tone echoing musical note pops up quite often, always whenever I travel to a new/already visited location. It's like it's a warning telling me time is running out for the survivability of this playthrough.
Has anyone else encountered this? Thanks!