The normal procedure to remove a browser search bar is to run its uninstaller if one is available or remove it via the Windows Add/Remove Programs utility as follows:
It is often the case with adware search bars that they don't supply an effective uninstaller and Add/Remove Programs won't remove them properly. In that case an adware remover such as XoftSpySE can be used to scan your system for adware search bars and safely remove them from your system.
Search Hijackers are spyware programs that hijack your default search engine. They may reroute your search and internet address requests through an unseen site to capture the search information. The targeted search page will generally include more advertising content rather then relevant search results.
Error Hijackers display an advertisement or other unwanted webpage whenever a requested URL is not found.
Homepage Hijackers are spyware programs that set the browser homepage (or start page) to unwanted search site. Normally it's possible to change your browser homepage via Tools -> Internet Options. However, homepage hijackers override this function to prevent you from permanently changing the homepage.
It's important to thoroughly remove all components of spyware hijackers to prevent them from repairing themselves later. XoftSpySE can be used to scan your system for homepage and search hijackers to safely remove them from your system.
XoftSpySE's Customer Support provides 1-on-1 help to remove search bars and hijackers should you run into problems.