Searched a bit. In dialogue options you need to take her side and say you'll help her. After she asks you for help, dont wait too long to start her quest. You have to start it inside 24 hour (in-game timer)
Now that you have increased resolution, your bottleneck is GPU not CPU.
Do what Pushy said and reduce settings. What game and settings are you checking?
IMO you should have gone for 1440p monitor.