@Scripts.Render("~/bundles/modernizr")
<script src="@Url.Content("~/Scripts/jquery-2.1.0.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.unobtrusive-ajax.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery-ui-1.10.4.min.js")" type="text/javascript"></script>
@Scripts.Render("~/bundles/jquery")
@Scripts.Render("~/bundles/bootstrap")
@RenderSection("scripts", required: false)
Use minified version of Jquery and Jquery UI and remove repeated script references.
Demo: