It seems some spyware has gotten through.
Luckily, its pretty straight forward to get rid of.
Just go to the "Control Panel" and then "Add/Remove Programs" and uninstall "MyWebSearch".
[ Source ]
Reboot and scan using SpyBot to ensure that it is gone.
Typical Infected folders:
- c:\program files\mywebsearch
Uninstall Myway MySpeedbar. It might be called 'My Search Bar', 'MyWay Speed Bar' or 'My Web Search Bar'. Remove what you find. Also remove 'Fun Web Products Easy Installer' if it is present.