AdwCleaner is a free tool to delete:
Adware (advertising programs)
The PUP/LPIs (potentially unwanted programs)
The toolbar (grafted onto the browser toolbars)
The hijacker (the browser start page hijacking)
It has a search mode and a delete mode. It uninstalls itself very simply using the "Uninstall" option.
It is compatible with Windows XP, Vista, 7, 8, 8.1 (32 & 64 bit versions).