hello.. it happen to me and this is what I did:

1) Uninstall qvod player
2) After uninstall, there still some program running to hijack the browser. You need to stop in the task manager something call qvod webservices.
3) After stop the backgroup process, remove the file in "C:\Program Files (x86)\QvodPlayer" and "C:\ProgramData\QvodPlayer". Note: ProgramData is hidden file, enable view hidden file to view it. Btw, I'm using windows 8.1. Directory might be different depending OS. Please also take note if you not able to remove the files inside the folder, please rename it to something else and then delete it.
4) Reset you browser. Eg: https://support.mozilla.org/en-US/kb/reset-...x-most-problems.
5) Check if your browser still redirect to hao123 with the above steps. So far my browser back to normal after done above steps.
6) If still not working. Try your luck and follow this steps "http://malwaretips.com/blogs/remove-hao123-virus/"