I haven't played in a good while - probably close to a year. Today I attempted to play and was forced to update.

The Minecraft Updater gets most of the way through "Updating Java runtime..." and hits me with "Unable to update the Minecraft Runtime Environment."

I have attached the full launcher log text file. Looking at the end of the launcher_log.txtfrom today, the following error is probably responsible:

[Info: 2019-10-11 16:30:03.8094579: PistonUpdate.cpp(361)] MoveFile(C:\Users\J\AppData\Local\Temp\MinecraftLauncher\PistonStaging\3e86865deec0814c958bcf7fb87f790bccc0e8bd, E:\Program Files (x86)\Minecraft Launcher\runtime\jre-x64\LICENSE
[Error: 2019-10-11 16:30:03.8098162: PistonUpdate.cpp(403)] Update failed for: LICENSE, Error: The system cannot move the file to a different disk drive.

[Error: 2019-10-11 16:30:03.8103588: UpdatePistonComponent.cpp(50)] Piston update failed!

I don't see what the problem is, however, as I should have all necessary licenses. I've been playing Minecraft since before the game had an ending.