hello sir,
These problems are caused by a bad context menu handler. A context menu handler is a shell extension handler that adds commands to an existing context menu (Example: cut, copy, paste, print, Scan with Norton etc). A poorly coded context menu handler may be causing any of the above symptoms. As context menu handlers can be added in different areas (file class, folder, allfilesystemobjects, HKCR\* registry keys), it's a difficult task for an end-user to pinpoint which shell extension is causing the problem