Hello, i have a problem , i have bought a hp probook 4540s since 4 months i didn't know about switchable graphics or anything but now i know my notebook has a radeon 7650 2gb GPU and an intel HD4000 anyway i run games using switchable graphics on high perfomance but when iam in game this cause delayed response while playing and stutter it gives late response for my mouse/keyboard moves plus when i close any game running on high perfomance it shows a blue screen then the notebook restart 
, oh another thing need for speed the run keeps crashing after 3/4 minutes of game play hope that someone help me thanks in advance 
sorry for any mistakes iam a newbie