Removing Genuine Microsoft Software Screen Lock/Ransom Malware

Hey guys,

So my wife's Dell laptop running Windows 10 (not sure of if 36 or 64 bit) got this lock screen last night. Don't know what she was doing or if one of the kids clicked on some kind of popup, but the pic attached is the screen she gets when she tries to boot.



She didn't run a scan, because neither of us were previously aware of scan logs, and I can't reinstall her Windows as I don't have (and am not to keen on upgrading to) Windows...

Removing Genuine Microsoft Software Screen Lock/Ransom Malware