I recently reset IE7 to defaults and my toolbars disappeared and in the View menu Toolbars they are greyed. After some hunting around I found the solution. I thought I would share this with everyone here.
Click on tools and then Manage Manage Add Ons > Enable or Disable Add Ons,
Click on the add on you want to enable then click on enable.
Close All Internet Explorer Windows,
Then Re-Open Internet Explorer,
They Should Be Working Now…