If the Rollback option is grayed out, note down the driver version and follow the steps given below
Follow on-screen instructions to roll back driver. In the Properties window, go to Driver tab and click Roll back driver. Right-click on your display adapter and click Properties. In the Device Manager window, go to Display adapters category and expand it. In the Run command box, type devmgmt.msc and click OK. Press Windows logo key and R simultaneously on the keyboard to bring up the Run command console. Here are the steps to roll back video drivers. In such cases, rolling back to previously installed video driver is the easiest solution available. Sometimes latest drivers don’t work properly with Windows 10 for unknown reasons. Solution One – Roll back to a previously installed video driver Keep on trying next solution in the post until the second monitor is detected. If the second monitor is not detected after trying Solution One, try the next solution. You are not required to try all solutions given in this post. In this post, we have provided four solutions to the “second monitor not detected” problem. The reason behind such problem could be wrong settings or drivers. If you are facing a similar problem, don’t lose hope as the problem might not be severe as you think it to be. Sometimes your second monitor is not detected by Windows 10 even though the monitor and the video adapter are working fine. The expanded screen real estate is great for work activities like general multi-tasking, writing emails, research, and comparing documents. 
A second monitor can be great in terms of general computing productivity.
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