See, this is a strange one. I couldn't find anywhere on the internet with a solution to the problem, they were all similar but different. When I click on the Minecraft launcher, it starts. But it doesn't load. It just stays as a blank gray window. Like the one you see for a split second when you start the launcher, and then after that the UI loads in. But it never does, it just stays gray:
Please help. Also sometimes it works, but it's a very small chance and very infuriating.