Error message "flash failed" on chrome os

While trying to put my windows 11 iso onto my usb flash drive, I get an error message saying “Missing partition table. It looks like this is not a bootable image. The image does not appear to contain a partition table, and might not be recognized or bootable by your device.” I click continue and press the “flash!” button to begin the process. It loads for a split second before taking me to another screen saying “Flash failed!” Anything I can do to fix this?

(using chromeOS btw)

Hello, it sounds like your iso is not bootable, do you have a way to confirm if it is supposed to be? (Some Windows images require special steps to be made bootable - it might not be possible on ChromeOS but here is a Linux example: How to Create a Bootable Windows 10 USB in Linux - It's FOSS - others can be found online too.) If it is supposed to be bootable and you downloaded it from somewhere, can you try downloading again to make sure the file is not corrupted?