I recently purchased an ASUS x550jk-dh71 laptop. I'm not a fan of windows 8 so I installed windows 7. Everything works fine except for the gtx850m graphics card. I installed the windows 7 drivers I got from the asus webtsite for both the intel adapter and for the nvidia adapter. However, the nvidia adapter has a yellow exclamation point next to it in the device manager. The error code it gives is 43. Help would be appreciated.