as posted before, you can partially solve the issue by rolling back to the default MS driver 14.8.8.75 uninstalling the Intel one. This worked fine for me since i wasn't too happy about flashing my bios. The funny thing is you cant roll that far back after you upgrade your 8 to 8.1. the default driver is the 16.X.X.X driver which is suffering from the same issue. I haven't found a way to install the 14.8.8.75 since I can't find it anywhere.