Download FlankScreen
For Windows 10 and 11 (64-bit). Free for 7 days; after that, a license costs $9.99 once.
Install in four steps
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Keep the download
Your browser may say the file isn’t commonly downloaded. Choose Keep (in Edge: … → Keep → Keep anyway).
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Run the installer
Windows may show a blue window Windows protected your PC. Click More info, then Run anyway.
Why: FlankScreen is new and made by an independent developer, and the installer is not yet signed with a paid certificate, so Windows does not recognize it yet. Download it only from flankscreen.com.
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Install the display driver
On first start FlankScreen asks to install its virtual display driver (open source, signed). Click Install. Windows then asks twice: allow administrator rights, and in Would you like to install this device software? (publisher SignPath Foundation) click Install. This happens once.
If Windows needs a restart to finish, FlankScreen says so and offers Restart now.
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Connect your device
On your tablet or phone (same Wi-Fi), scan the QR code in the FlankScreen window or open the address shown there. Then drag any window onto the new display.
After the trial
During the 7-day trial the device screen shows a small “Trial” mark. To keep using FlankScreen, buy a license and enter the key in the program. Questions: support@flankscreen.com.
Uninstall
Windows Settings → Apps → FlankScreen → Uninstall. The display driver is removed too.