I installed the popular old
screensaver - fliqlo (http://www.9031.com/downloads/screensavers.html) and whilst the screensaver works perfectly - If I leave it running for say 15-20 minutes, and then move the mouse to resume - I'm returned to my desktop as per normal - however, the taskbar is no longer visible, and all I can see is the Windows Icon start button (as well as my other desktop items) ...