Is your SCCM installation taking ages in a Hyper-V guest?
Rebuilding the SCCMChris lab as time permits, I ran into an issue during installation of tech preview v1703 — the installer would hang during the database setup for many, many hours. It didn’t seem to completely stall, but after a day, installation was still chugging along. Thankfully, there’s a simple solution! For your guest machine, disable “Dynamic Memory” in Hyper-V manager, uninstall the site to reverse your failed installation, then kick it off again.