My first thought regarding the site, if in fact the virus was from it, was why has someone not reported it and had it quarantined. I suppose the virus may have been obtained from another area and just happened to activate at that time.
But Defender did find it when doing a scan, but did not keep it from being installed. I do usually run a couple of programs, but they are not really good at blocking the virus.
Had I ignored the indications I saw while on the website, hard to say what might have happened if they system was allowed to reboot. I suppose I have been lucky as far as virus infections...