This has been a common question/complaint.
 
What is your SC17's laptop BIOS version?  Enter the SC17's BIOS menu by mashing the "F2" key repeatedly during initial power-on/boot, and then view the BIOS version number displayed in the bottom-right corner.  If you haven't yet updated to BIOS version 1.06 or later, update to BIOS version 1.06 or later.  Some earlier SC17 BIOS versions had some major boot, display, and Windows 10 Update issues with the latest patched version of Windows 10 and newer NVIDIA drivers.
 
BIOS version 1.06 change notes:

 Fixes black screen / boot delay issue for affected SC17 1070 laptops.

 
From any working computer, download the most recent BIOS version.
https://www.evga.com/support/download/
Tab: "Other Products" -> Category: "Laptop" -> Part Number: On the back of your laptop -> Type: "BIOS"
 
Then, from that working computer, open up that compressed file which you just downloaded, and copy only the "SC17****.bin" file to a working USB drive.
 
Then, boot up your SC17, enter the BIOS menu by mashing the "F2" key repeatedly during boot, plug the USB drive into the SC17, select the "Save & Exit" tab near the top of the BIOS interface, select "Restore Defaults", and then, after the BIOS has been reset to default settings, select the "Select BIOS File" option below the "BIOS Firmware Update" heading, choose the "SC17****.bin" file on the USB drive, and perform the BIOS update process.
 
Once the BIOS has been updated, Windows should boot properly.  If Windows for some reason became corrupted during this event and will not boot properly, you can reinstall Windows using the Windows 10 Media Creation tool from any working computer.  https://www.microsoft.com/en-us/software-download/windows10
 
Good luck!