You should not have to resort to a total reformat for this one unless they've changed it.
Tyically it can be removed with malwarebytes free and also be prepared to have to edit a couple of entries out of the reistry so that it does not come back again.
If you do a websearch on the message that the malware is presenting to you, you will find the directions for how to remove the particular one you've got.
And it is not likely that you did anything bad or wrong to get this one, it apparently can be embedded ihto any website and installs automatically when you visit the page.
Do the search, read and understand the instructions well before going to work on it and you can get rid of this one.
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"Keep listening. Never become so self-important that you can't listen to other players. Live cleanly....Do right....You can improve as a player by improving as a person. It's a duty we owe to ourselves." --John Coltrane
"You don't know what you like, you like what you know. In order to know what you like, you have to know everything." --Branford Marsalis