When I down loaded Win 10 yesterday, both my monitors worked fine. How do I fix this?

[Windows Central Question]

When I down loaded Win 10 yesterday, both my monitors worked fine.

Now Win 10 says it can't detect the second monitor and can't save settings for a 2nd monitor. Monitor 2 is plugged in (Surface recognizes it with a chirp) and on. How do I fix this?

 

[rhapdog]

Re: When I down loaded Win 10 yesterday, both my monitors worked fine.

When I installed Windows 10 for the upgrade, for some reason Windows 10 set me up with a "generic" graphics driver that did not take advantage of my graphics hardware. It was unable to detect a second monitor until I went to the manufacturer website, downloaded and installed the proper graphics driver. After that, it was smooth sailing.

I also had a lot of "jerky" scrolling until I updated, because true hardware acceleration wasn't available until I installed the proper driver.