If your Steam client doesn’t open or it does but it’s stuck at the connecting phase, the most reasonable explanation for your issue is either an unstable connection or Steam being temporarily down. Steam is a large platform they don’t have the time to test for every bug, just the major ones. Originally Answered: why does steam update so often? Adding new features and improving the existing ones. If you’d like to stop Steam from automatically updating a game, select “Only update this game when I launch it” from the game’s Library page > Properties > Updates. Select Only update this game when I launch it.
How to Prevent Steam From Auto-Updating Games