Currently I run Windows Insider builds on my second pc. The recent days it tries to update the build but everytime it reboots a GSOD will appear with a System Service Exception caused by "afd.sys". I tried the Windows update fixit tool and also did a sfc scan. Nothing helped. After the GSOD it needs manual reboot then recovers back automatically to 17677 and will download the next Insider build again.
Microsoft fixed the issue in Windows 10 Insider Preview Build 17692
General changes, improvements, and fixes for PC
- We fixed an issue resulting in some Insiders recently experiencing a bug check (green screen) with the error SYSTEM_SERVICE_EXCEPTION in afd.sys.
So check again for new updates and download the last Insider Preview.