As you likely know, online scammers often contact Windows users and pretend to be support techs. They say they have detected a problem with the person's computer and want to fix it. Consumers naive enough to grant access to their computers via remote software are presented with large bills for the service — though the bogus techs don't actually fix anything — and in some cases their PCs are infected with ransomware that locks them out of their computers until they pay ransom.
Shortly after placing a support call to Dell for help with a Windows 10 update issue, Richard Schulman, a retired computer consultant, received one of these calls. He did exactly what a savvy consumer should. He hung up. However, Schulman soon got another call from someone who also claimed to be Dell technician, but because the caller's English was so heavily accented and the call quality so poor, he quickly surmised that it was another scam.