I have the evga GeForce 210 in a slimline case and Windows 10 64-bit.  I am using the latest drivers from evga, 341.95-desktop-win10-64bit-international.
 
The problem is that Windows does not recognize that the DVI port exists!  The VGA ports works fine.  The BIOS finds the DVI port, and when the Windows 10 boot starts, the initial blue Windows flag shows up.  Then the monitor goes blank and nothing else.  If I plug a monitor into the VGA port, there's Windows, patiently waiting for me at the login screen.
 
Anyone got any ideas?  Nothing wrong shows up in Device Manager.

I recommend downloading a program called Display Driver Uninstaller, you can find it HERE. Before you run DDU, download the latest driver version from our website HERE and save the file on your computer. Install and run the Display Driver Uninstaller program, it will ask to boot into safe mode. When you have booted into safe mode select the option "Clean and Restart (Highly Recommended)". This will clean the previous version of the drivers out of the system and registry and boot back into Windows. Locate the folder where you saved the drivers from our website, open the driver installer. Select "Custom Installation", you will see a check box to perform a clean installation, be sure to check that box then finish the install. That should potentially fix any driver issues.