Update: the issue seems to be solved but I tried to replicate the glitch. I spawned a Virtual Machine ( Win 10 ) and installed the free CCleaner and began re-playing some Starcraft 1. ( gaming on Virtual Machines is generally horrible but Starcraft 1 is not very demanding so no problem there ).
Anyway there was no 5:30 hickup but at 5:25 PM local time the game totally froze.

Had to restart the VM. Might have been a coincidence. The rest of the time the game plays just fine. I'll make an other attempt some other day.
