See this post if you receive Boot Device Not Found, Please install an operating system on your hard disk message while booting Windows 11/10.

The “Boot Device Not Found (3F0)” error stops your computer from starting and shows a black screen with a warning from the BIOS. This error means the ...

Fixing the “Boot device not found” error for good The “Boot device not found” is an error that can make accessing your PC troublesome.

This error code comes along with the message Boot Device Not Found. Please install an operating system on your hard disk 3f0 which indicates the system could not find the hard drive.

If your computer shows a "Boot device not found" message, it usually means there's an issue with the disk or the operating system's startup process.

@BroderPeters thanks, I've installed arch linux a few times manually (with encrypted disk), I thought the point of the archinstall was to automatically install a working system. I don't understand why ...

If you see a Device not migrated, Device could not be migrated message when you open the Properties of USB, External Drive, etc. in Device Manager on Windows, do this.