I don't know what exactly happened but after i rebooted BT4 the there changed to something else.I don't remember changing anything.I restored the desktop but the problem remains with everything else like the taskbar.Even firfox is now different (the start page is different and the Noscript addon is gone!).

Here is a look to my problem:

Uploaded with ImageShack.us

Is there anyway to restore everything to how it was at first?Other than Reinstalling?It would be troublesome for me to reinstall everything.