Vista and XP are no longer supported by MSFT, so there aren’t any security patches available. Their users are in extreme danger.
Some of the commercial security programs such as Malwarebytes offer protection in their “premium” (paid) versions but users of free security software may not be protected.
Microsoft came out with a patch for the no longer supported versions XP, Vista.
MalwareBytes has an anti-Ransomware product in late beta, which is FREE. Might be a good solution for XP/Vista users. Search “Malwarebytes anti-ransomware”. I downloaded from a link at Major Geeks. Installation was fast and easy.
Well I have Norton’s Full House and so far nothing ever got through.....