I'm sure screen is 4k, Its a newer series than fhd,also you can find this series whit UHD screen in official lenovo site
in user manual isn't any explain about such this prolem
additional info:
I have windows 8.1,nvidia geforce 860 gtx and intel 4600 hd,
Hi guys, I just buy a lenovo y50 UHD laptop,the screen resolution should be 4k but when I check screen resolution in windows it shows 1920*1080!!
I try to increase the resolution via Control Panel\Appearance and Personalization\Display\Screen Resolution but the highest resolution available...