Even after removing Omnibox (Oursurfing) from the computer using Windows Defender, Malwarebytes Anti-Malware, and other anti-spyware programmes, I still find Omnibox becoming my search engine. I tried reset-ing Google Chrome and IE time and again and although it's not popping up for now, I can see it in my settings. I can't locate the exact file and delete it. This happened in my office computer and a network environment. Please help URGENTLY! I don't know what to do anymore. We are using Windows 8.1