Minecraft 1.6.4 on Windows
Christopher Martinez
Published May 05, 2026
I tried to run 1.6.4 with MultiMC and the official launcher, in both cases the game wouldn't launch, but if I tried to launch it multmc / the official launcher would complain that it was already running. Minecraft 1.6.4 didn't show up in Task Manager, either. Is it simply not possible to run 1.6.4 on Windows anymore?
51 Answer
Fixed it! I'm not sure why this fixed it but I restarted my PC, deleted .minecraft, and now 1.6.4 starts up just fine.