How to create an AMI from a running/existing windows instance?

I have a running/existing EC2 instance wi开发者_StackOverflow中文版th Windows Server 2008 with instance backed, how do i create an AMI from this existing instance?

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Under "EC2 Service Settings" on the existing instance, select if you want to run sysprep after the bundled instance is re-instantiated.

Then, go to the AWS management console, right-click your instance, and click "Bundle". Select your credentials and destination S3 bucket.