has hijacked my browser,how do get rid of it?

hi installed a program flvtube,it has hijacked my browser, ,instead of google search, appears, i have searched the internet for a possible resolution to no avail. I suspect it is a malware/virus.Comodo doesn’t see at all

First I would follow the method I have described here to ensure your computer is not still infected.

After that I believe you may need to reset your hosts file, but I’m not sure.

Have a look in your Add and Remove Programs list to see if any part of it can be uninstalled. You may find a toolbar as well as the program itself.