I've never heard of "to_be_default", but a quick google search shows... Here's how to create a Default Profile in Win 7 without using SysPrep and avoiding issues
Are you sure this wasn't implemented by someone in your org on your parent/template image? Maybe create a new template from a clean ISO and try it again to see if it's the spec or the image.
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Jack McMichael | Sr. Systems Engineer
VMware End User Computing
Contact me on Twitter @jackwmc4
