Any updates on this?
This possible fix does not work for me; Gaming Services will not open. Only solution so far to allow me to actually load and play Minecraft was to install Windows 7/8 launcher from Mojang website.
Thanks! Before you responded I nosed around Mojang's website and found the Windows 7/8 installer download and luckily that doesn't automatically update so I can at least play Minecraft once again.
"I eventually uninstalled it the new launcher and reverted back to old launcher (which worked instantly)."
How did you do that? Mojang customer service chat gave me a link to reinstall the old launcher and Minecraft but as soon as it installs it does the launcher upgrade without prompting to the Microsoft one and breaks everything.
No one has contacted me and I'm still using the Windows 7/8 launcher to play