My very old mother has an old computer running Windows 7 and I suspect the antivirus is long out of date. She lives a long way from me, so I can't look at the computer, but my sister told me my mother's computer now has a login set (she never had to log in) and the password hint is happyday. I'm suspecting the worst. She's going to have a guy look at it one of these days. I googled for this password hint but didn't find any ransomware or other malware that uses this particular MO. Any thoughts?