Same deal here. Tried to launch the OSRS windows launcher; gets to "Connecting to Update server" then crashes (consistently):
Error*game_crash - A problem has occurred while running the game.
This game has encountered a problem and cannot continue running.
We strive for our games to work on as many computers as possible and to be free of bugs.
If you are able to reproduce this problem (i.*. it always occurs when you do a certain thing), then please submit a bug report via our website, and we will try to fix it as soon as possible.
If problems persist, please refer to the Technical FAQs, which can be found in the Customer Support section of our website.