I have no idea why, but when the launcher is open, my cpu usage goes up to 100%. It doesn’t do much if it’s minimized or in the system tray, but if it’s just open sitting around doing nothing it uses up all my cpu. I have an 17-4770 btw. Wasn’t too sure where to post this.
My fix would be to uninstall the launcher.
run CCleaner and clean all logs and cache.
The restart the computer.
reinstall.
Hopefully that should help. (It worked for a buddy of mine.)