An accumulation of stuff gathered over years…
Caution: This may cause your system to hang on boot.
I must admit, I haven’t done a fresh install of this system since upgrading to Windows 10 1903, moving the NVMe drive from an older laptop to this machine, updating the OS about every week to the latest version of the Insider Preview in the DEV Channel. This is bound to cause issues at one point, I’m aware.