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It sounds like you may be trying to deploy an instance type that does not support UEFI. Can you check whether you are using a current generation instance type such as c5, m5, r5, etc? (full list here: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instance-types.html#current-gen-instances)
Sorry, I wasn't concrete, I missed an important information: We get this error message, when we would like to convert the uploaded image to AMI. Our process:
- Build the Win11 image locally
- Upload the image to S3 bucket
- Convert the image to AMI
The above solution works in case of Win10, but in case of Win11, we got the mentioned error message.
VM Import/Export added support for Windows 11 images (and Secure Boot). After importing the UEFI image, you do need to use a supported instance type
Check out the blog post Bringing your Windows 11 image to AWS with VM Import/Export for more info.
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I feel like I should add a few details, but it was too long for comment and definitely it wasn't an answer. So I've asked my own question. I feel like the problem is the same.
https://repost.aws/questions/QUJbR6AqiOSU2rHHkkyGEB0w/client-error-ena-must-be-supported-with-uefi-boot-mode