I launched battlenet, saw there was an update for the launcher, did that, then both my installs of WoW and WoW classic were just gone??? After the reinstall my game started having trouble even launching, loading up, crashing constantly.
Restarted my pc to see if that would help. Deleted itself again. But that was just a fake out? It said it needed to “update” i.e. install the whole thing again, but also said it was ready. It then launched the game, crashed, and deleted the folder it launched from because I got a windows pop-up saying “this folder no longer exists” immediately after.