David Musgrave asks Why does my computer get stuck at Please Wait and fail to boot up? At first this doesn’t seem very GP centric, but give David a minute. He brings it back to GP.
Why does my computer get stuck at Please Wait and fail to boot up? – Developing for Dynamics GP – Site Home – MSDN Blogs
Archived post from 2013. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.