Note that many websites have their own advertising, unrelated to adware.
An IE toolbar. Its contents are loaded from a page at ezcybersearch.com each time a new Internet Explorer window is opened, and may include link buttons and a search field.
Linked to EZCyberSearch.com, 50cents.com, 50centlyrics.com. And probably to CoolWebSearch because it has turned lilac in colour. It was always related to AllCyberSearch, GoCyberSearch and TinyBar, which now all have gone over to CoolWebSearch.
Removable from "Add/Remove Programs" on the Control Panel. To clean up you can delete the 'ezsearch.dll' file inside the System folder and the 'Inst Class' entry in the Downloaded Program Files folder (both in the Windows folder), and the registry key HKEY_CURRENT_USER\Software\ezSearchBar if you like.
Uninstall is located at http://18.104.22.168/uninstall.html
If there is no entry for ezSearchBar in Add/Remove Programs, try opening a DOS command prompt window (from Start->Programs->Accessories) and entering the following command. For Windows 95/98/Me:
"%WinDir%\System\regsvr32.exe" /u "%WinDir%\System\ezsearch.dll"
Or, for Windows NT/2000/XP:
regsvr32 /u "%WinDir%\System32\ezsearch.dll"
Then clean up as above