I've recently updated Windows 10 on my yoga 2 laptop and suspiciously my laptop can no longer detect a second screen. I've had enough problems recently following updates to suspect that yet again Windows is messing with my setup. I've checked the monitor on someone else's laptop and it works perfectly and I've swapped between three different HDMI cables and nothing. It's worked fine up till now. I've tried downloading the driveer software for the monitor but still nothing. Please any suggestions? I'm not massively technical and this issue is driving me nuts.