I was not able to reproduce this. I installed the trial version of AVG Internet Security software and then checked our demos at http://demos.telerik.com/kendo-ui/ -- I've got no warnings about kendo.all.min.js. (using IE 9 / Windows 7)
I also tried scanning the directory tree of a professional Kendo UI build, but there were no errors, as you can see in the attached screenshot.
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