Yesterday I downloaded the latest version of Avast 4.8, as prompted by the update notification, in XP Home SP3 / IE 8. It then asked me to reboot and so I did. Panic! All desktop folders and icons disappeared, leaving only the wallpaper and “My documents” “My computer” and “Recycle bin”. Also the programs and applications listed under the “All programs” tab are but just a few (and there were many!). I can’t access system tools, nor games, etc, all these folders have either disappeared or are empty. What I have done already: