my btbroadband have dissapeared stale my computer , even the motif at the bottom right of my eyeshade have gone but?

Answer:

Go to Start, All Programs and scroll through. If it is down there, create a shortcut and move it to your desk top. Right click on the btbroadband to create a shortcut.
if the ultimate answer didn't work and you have tried a system restore

consequently the only entity you can do is to reinstall the software