Установил с первой ссылки, ввел лог/пасс, запустил с консолью:

GET: version.md5
GET: update.lst
GET: ./version.md5

Java Path: C:/Program Files/MinecraftLauncher2/jrex86/bin/java.exe
Error occurred during initialization of VM
Could not reserve enough space for object heap
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

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