This message was posted on behalf of Intel Corporation
I understand the graphics driver disappeared after the installation of Windows* Fall Creators Update.
Let me apologize for any inconvenience this issue may be causing to you.
Since your computer comes with two video cards there is a special driver that needs to be installed. This graphics driver is provided by Lenovo* only. Lenovo* has customized our drivers to make both video cards work fine with each other. Please install the graphics driver Lenovo* provides on this link https://pcsupport.lenovo.com/cr/en/products/LAPTOPS-AND-NETBOOKS/LENOVO-Y-SERIES-LAPTOPS/Y50-70-NOTEBOOK-LENOVO/downloads/DS103720
Let me know if issue persists or not.