Minecraft's latest launcher unifies the Java, Bedrock, Windows and Dungeons edition and here is how to get the minecraft launcher.

Fix Minecraft Exit Code 6 by disabling outdated mods and updating Visual C++ and Java. Other than that, follow these suggestions.

Somewhat confusingly, there was an old launcher called 'Minecraft Unified Launcher', which was specifically for Windows 7 and 8 and only launched Java Edition and Minecraft Dungeons.