Free Republic

Need some Freeper help here- I've seen this kind of thing mentioned on here before. My computer has become infected with a virus that tells me I have a "hard disk" problem, that can only be cured by registering their software (six or seven different versions, it would appear). This happened to my wife a couple of months ago with her laptop- she went in under "safe" mode, downloaded and installed Malware Bytes, and the problem was solved. We did the same tonight with my computer, but it did no good. does anyone have any ideas? Thanks in advance!