Hello, Go to you Control Painel >> Add and Remove Programs, look for suspicious programs in your computer, if you find unwanted programs unistall them probably one of them are the problem. Edit: Also look to your addons, sometimes those problems are caused by unwanted add ons, you can start Firefox in Safe Mode to discover if the problem is a addon *[[Troubleshoot Firefox issues using Safe Mode]] A guide: *[http://www.techsupportall.com/solved-how-to-remove-omiga-plus-homepage-omiga-plus-com-removal-help/]

No - done all the usual stuff including the registry but can't find it anywhere.