I attempt to open a SharePoint document library in Explorer View via IE and get. …Are all other parts of the your SharePoint site accessible

Please wait while Explorer View is loaded. If Explorer View does not appear, your browser may not support it.

1. On the Tools menu, click Internet Options.
   
2. On the Advance tab, click to clear the Use HTTP 1.1 check box.
   
3. Click OK, and then exit and restart Internet Explorer 6.