Windows10 wallpaper

If you have multiple displays or an external projector, you might find the built-in feature of Windows 10 to change the active display and the sharing mode of your current desktop useful. The feature called Project allows the user to have only the primary screen enabled, duplicate it on a second display, extend it across all displays, or use the second screen only.

The Project feature in Windows 10 offers the following modes:

  • PC screen only
    Only the primary display is enabled. All other connected displays will be inactive. Once you connect a wireless projector, this option changes its name to Disconnect.
  • Duplicate
    Duplicates the primary display on the second display.
  • Extend
    Your desktop will be extended across the all connected monitors.
  • Second screen only
    The primary display will be disabled. Use this option to switch to the external display only.

So, you can set individual display mode and resolution for each display connected to your PC, laptop or other Windows 10 device. The operating system remembers these settings by storing them in a cache and applies them every time you connect the earlier configured monitor. This is very time saving, as you don’t need to reconfigure an external display once you connect it.

Windows 10 Screen Resolution Keep Changes Revert
Windows 10 – Display settings

Then, the external display cache is stored in the Registry. If it gets corrupted, the display output may stop working as expected when you connect to an external monitor. In this case, you can try to reset (clear) the display cache. This will force the OS to forget connected external monitors and all their settings. Here’s how it can be done.

Note: To clear and reset the display cache in Windows 10, you must be signed in with an administrative account.

To Clear and Reset External Display Cache in Windows 10,

  1. Open the Registry Editor app.
  2. Go to the following Registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers\
    See how to go to a Registry key with one click.
  3. Right-click on the subkey Configuration and select Delete from the context menu.
Windows 10 Clear Reset Display Cache
  1. Now, delete two other subkeys, Connectivity and ScaleFactors.
  2. Restart Windows 10 to make the changes done by the Registry tweak take effect.

You are done!

Finally, to save your time, you can download the following ready-to-use Registry file. This will allow you to clear and reset the display cache with a couple of clicks without editing the Registry manually.

By Enrico

My greatest passion is technology. I am interested in multiple fields and I have a lot of experience in software design and development. I started professional development when I was 6 years. Today I am a strong full-stack .NET developer (C#, Xamarin, Azure)

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