I can provide the Windows minidump file if it's of any use. The error is WHEA_UNCORRECTABLE_ERROR. Unfortunately, I can't provide an After Effects crash report because one isn't ever made as far as I can tell. This has happened about a dozen times in the past 2 months. Just today I've run Prime95 and 3DMark for error checking and stress tests, I've used ffmpeg and HandBrake with no issues, and a whole host of other things to make sure it's specifically After Effects causing it. I've used After Effects for almost a year and it's never been an issue until now, so with that combined with the aforementioned tests I don't suspect it's a hardware issue. I'm not overclocking. Running sfc /scannow finds no errors.
System information:
OS: Windows 10 Home x64
OS Version: 1803
OS Build: 17134.471
Memory: 32 GB
Processor: Intel i7-7820X @ 3.60GHz
Graphics card: EVGA GeForce GTX 1080 Ti
Motherboard: ASUSTeK TUF X299 MARK 1
BIOS vendor: American Megatrends Inc.
BIOS version: 0702
BIOS date: 08/08/2017
After Effects information:
Version: 16.0.1 (Build 48)
The memory dump contains DEFAULT_BUCKET_ID: WIN8_DRIVER_FAULT which, upon searching, may mean I need to upgrade my SATA drivers.
Please let me know if you need any more information, as any and all help is appreciated.