Do reboot first, then review http://www.compulink.co.uk/~davedorn/computing/windows/foldview.htm to see if you can reset all folders to the defaults.
The web content of my folders have disapeared. so that my folders can only be viewed in the 'traditional' view, with no side panel.
changing the settings in Folder options does not work, although explorer bars (such as search etc.) still appear.
Any advice as how to bring this back would be highly appricated
Nick

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic