Chuch, don't feel downhearted. It's a common windows problem. Most probably another worm or virus attack. But can't understand why the "local experts" want to charge as high as "$119.
Another clarification, can you access yours apps in your windows? And only task menu and icons gone? Or you can't even click or access Task Manager? You can however run apps using Task Manager, CTRL+ALT+DEL, (File>Run(new task). If that is accessible, download spybot
http://www.tucows.com/preview/310138 into a removable drive, and install and run it from TASK MANAGER. I do think it's a virus/worm bugging your windows.