When my grandma was in her 80s, she took a call like this. She was talking for a good 5 minutes saying things like "oooh no, you're from Microsoft?" and "my computer has been compromised?"

The whole time, she was smiling and winking at me then says, "Well hang on just a second, let me hand the phone to my grandson. He's a police officer and can help us get this sorted out." Then she immediately handed me the phone, where I didn't miss a beat and said "This is officer Dan with the Aurora Police Department, who am I speaking to?" and they hung up instantly.

Don't fuck with old ladies.