What is RSOD?

I’m not sure if this is the best place to talk about this. However, I was browsing some scammer Facebook groups and I came across this advertisement by one of the members: Screenshot - 461c6200e65ab4f14144d3512cc10b74 - Gyazo I know what BSOD is, but I’ve never really heard of RSOD. Are those types of campaigns the same? The post also talks about “hard freezes”, so I’m guessing it might be a type of malware that locks your computer?