[MCL-5638] Unable to locate the Java runtime

Moderator Note

There are essentially three seperate issues combined in this ticket number:

1. A general problem with symlinks and junctions. Please see this comment for details on how to fix this temporarily.

2. A bug that causes issues with detection of the Java runtime. To fix this issue manually, you need to delete the "runtime" folder in the following folder: "C:\Program Files (x86)\Minecraft\".

3. Make sure the Java Executable setting on any launcher profiles you have set up in the Launch Options menu is set to off

The new launcher (2.0.74) cannot launch minecraft because it cannot find the executable.

What I expected to happen was...:
The game launches just like ALL previous versions of the launcher

What actually happened was...:
Error details: The system cannot find the file specified
Filename on disk: javaw.exe
Path: C:\ProgramData\Oracle\Java\javapath\javaw.exe
Exists: file

Steps to Reproduce:
Start Launcher
Click Play

I've also RESET the profile BACK to specifying the actual path to the exe because for some stupid reason the new crap launcher changed the settings on ALL my profiles. The launcher is crap. It even crashed and Windows had to close it.