Windows won't let me pick bootable usb for Windows 11/10

I encountered a similar problem before. I plugged in the boot disk, but Windows won't let me pick bootable USB for Windows 11. After a lot of trouble, I found that the problem was with the USB and ISO file. My experience can give you some reference!

USB problem
I used an old 8GB USB flash drive that time. Although the capacity was enough, the writing speed was slow and there were errors from time to time. Later, I changed to a newer USB and it was recognized directly. Therefore, you must use a reliable USB flash drive, such as Sandisk or Kingston, which has better stability. Remember to clean and format it with diskpart first:

diskpart
list disk
select disk X  
clean
create partition primary
format fs=fat32 quick

Although I downloaded it from Microsoft's official website, I later used a tool to verify it and found that the ISO file was actually damaged. Later, I downloaded it again and the problem was solved. So after downloading the ISO, it is best to use a verification tool to check MD5 or SHA256 to confirm that the file is complete.

My suggestion: 
If you change the USB or re-download the ISO and it still doesn't work, try using Rufus or Venttoy to create a bootable disk. These two tools are more compatible with hardware. I used Rufus to get it done, and it was successful instantly! I hope these experiences can help you~ 😊