>>Checking Media Presence……

This would indicate a reboot and the possibility that it was unexpected. Then again, it could have been a planned restart for some other reason that the doctor didn't know about.  Most are not all that involved in the IT side of things.

The line "Start PXE over IPv4" would normally mean that the "boot' disc is to a server via the ethernet adapter. Many PCs you see in doctor's offices are some sort of thin-client setup both for space, cost and security.

Probably before the reboot happened, the terminal/OS had saved out what the doctor had been looking at, thus when he logged onto another terminal it would be logical to have the same screen come back up. Think of like when you have files saved to memory or having Explorer open up to certain folders when you reboot your home PC.