VS2010 very slow access to TFS2008 - how do I trobleshoot

The problem is because use "Use automatic configuration script" with a entry http://server/Get.Routing.Script.

Removed it or try the following:

<!-- Disable web proxy autodiscovery (download and compilation of javascript to determine proxy) -->

<system.net>

<defaultProxy enabled="false" />

</system.net>

The .exe.config for Visual Studio is %VSINSTALLDIR%\Common7\IDE\devenv.exe.config and it already contains a section in the .exe.config for System.Net. After adding the defaultProxy element, that section would look like this

<system.net>

<defaultProxy enabled="false" />

<settings>

<ipv6 enabled="true"/>

</settings>

</system.net>