I would go comprehensive with a couple of utilities often recommended here;
Malwarebytes' Anti-malware, and SUPERAntispyware.
Download and install both, run and update each and perform separate scans with each, eg one at a time.
No mention in your post of a firewall or an installed anti-virus, and while neither would necessarily prevent such browser hijacks, they are essential additions to our arsenal of security.
Good luck, and I hope those scans work for you.
Whenever I run a search, I get a page like google, except it may not be google search page, since it does not have sponsored links on right side. When I click on a search item, it takes to me not to the search url, but to some other link altogether. This happens in firefox only, but my Chrome is not working altogether - does not even open the home pages I have set. Opera, Safari and IE work fine.
Please please help me, as ff is my default browser, and it is not working. I have downloaded and run trojan remover and hitman pro, as suggested in some forums I visited earlier.