Caller representing themselves from Dell customer service. My computer is sending out error signals. The computer they are calling about was sent back to Dell in October 2015 because the charger died and it would no longer turn on. Hard for a system that doesn't charge to send out error signals, and Dell knows I no longer own that computer because they sent me the new replacement under warranty. Definitely a scam call. They have called before and hung up when I mentioned they were scammers.
Caller: Dell