Hi Brian,
Thanks for sharing the string. This makes it clear that the Creo embedded browser is reporting it is IE7 even though you have IE11 installed. Somewhere there must be a configuration that is telling the browser to act like an older browser.
You may have a compatibility mode setting in IE11 that is causing this.
I understand Technical Support has reached out to you. Please send them the registry exports of the working machine (fresh OOTB with IE11) and the non-working machine (with IE11). We'll help you study the registry differences.