The operating system is on C:, which is an SSD with currently only 23 GB free, which may be a problem. The documents folder is on a 1.81 TB standard disk, and I moved the game to a 931 GB SSD with now 203 GB free. I still had 21 GB of physical RAM and 56 GB of page file memory free when the game crashed.
Although the numbers look good, I know that my system runs better if I have more space directly on the C: drive. Let's see whether I find anything to nuke.
Edit: There's also the point that Windows pushed one of its larger updates this morning. These usually take a few days of updates for me to sort themselves out. Furthermore, the backup it produced ate 15.5 GB on my system drive.
