Fligthting, a term used by Windows Team, is the process of running Windows Insider Preview Builds on your device.
How to check if you are Flighting or on Windows Insider Build
Opting into an Insider build is a process that cannot happen accidentally. You need to give your consent, signing with the Microsoft account, followed by a restart and installing an OS update. But if you still want to check, or maybe you never left the insider build and forgot about it, here is how to check. To know the current insider build number available for flighting, visit the official Microsoft Page, and check the build number for each version.
1] Check for the watermark
[Images sourced from Microsoft] Right above the taskbar, where the clock is available, check if you can see any text or watermark with details such as Insider Preview, Evaluation Copy, Build no, etc. are available. If yes, then you are running Windows Insider build.
2] Check the About section in Settings
When Windows Preview builds are installed on the computer, the same is reflected in the Windows specifications section under About. Notice terms like Insider Preview, different build numbers, and so on. Go to Settings > System > About > Windows specifications to find the details.
3] Run Winver command
winver command in Windows can reveal details about the current version of Windows along with OS Build. Type winver in the Run prompt, and press the Enter key. This will open a window where all the details will be available. Notice details such as Evaluation copy, Expiry, etc., to find if the insider build is installed on the computer.
4] Check Windows build with PowerShell
PowerShell is a powerful utility in Windows that can help to figure out the Windows build. Type and execute the following command: Match this version number, and check if it is close to or matches the existing build number. If yes, you are running an insider build.
5] Check with Windows Insider Settings
The last and final check is to go to Settings > Update & Security > Windows Insider Programme. If you see anything else except a “Get Started” button, you run an insider build. TIP: Follow our exhaustive guide if you are on Insider Build but you want to quit now.