Re: using Ubuntu Live CD 12.04 to purge virus on Windows Vista
It's called ransomware. It's a backdoor virus, usually a trojan, that instructs users to call a number or purchase an card that you load with cash and send them the numbers. My friend got one 3 times and he spent $500 paying them to "remove" the virus only to get it again. You could have also tried other antivirus boot CDs such as Avira, AVG, BitDefender, etc. If they were running XP, I'd just switch them to Linux. Not sure what kind of sites they were on, but not good.
Dell XP 8700 - Windows 10 64-bit Fast Ring - i7 4790 8GB 1GB 250GB SSD 1TB HDD
HP Stream 13 - elementary Loki 64-bit
HP Envy M6 - Windows 10 64-bit