If it's the same virus I had mojo, I did what chris suggests, and it mostly worked, but I also did this http://www.theanswerbank.co.uk/ChatterBank/Question1222588-2.html#answer-7801422
Some adware (= malware) has found its way onto your computer, Mojo.
Download, install and run the free version of Malwarebyte's Anti-Malware to get rid of it:
http://www.malwarebytes.org/products/malwarebytes_free/
(NB: Towards the end of the installation process you'll see a box with three ticks in it. Click to remove the one which offers you a trial of the 'PRO' version before proceeding).
Well Superantispyware has found it. It's called Somoto.
I got it when I downloaded a formerly trusted screen capture program. I was trying to learn to make a gif.
Thanks again for all of your help. Legends, the lot of you.
You can put a link to it if it answers some question; if it doesn't, or if it looks like advertising, it'll be removed and (since you haven't contributed anything else yet) you may be too.