If you find it takes long time to open shared documents on your SharePoint server with explorer, you may be in the right place. The solution is very simple. Just disable “Automatically detect settings” in Internet Explorer.
Here is how:
1. Open Internet Explorer. Go to Tools menu. Click Internet Options.
2. In Internet Options, go to Connections tab.
3. Click LAN settings.
4. Uncheck “Automatically detect settings”
5. Click OK twice to apply changes and go back to Internet Explorer to try “Open with Explorer” again.
Wow! Problem has been fixed! Right?
PS. Here is what should look like after making the change:
