How can I tell if a call is a scam?

Episode 1497 (2:02:36)

Michael from Santa Monica, CA
Man yelling at phone

Michael has been getting robocalls for a new scam, where they contact him regarding his internet activity after buying Google ads. Leo says that there's always a new scam and it becomes even more important to know that they are out there and when he gets a call he doesn't recognize to ignore it.

Key signs it's a scam: they accept something other than a credit card as a form of payment (like gift cards). There are a ton of misspellings. And if you give someone remote access, the only way to make sure you're not compromised, is to backup your data, format your hard drive, and reinstall your OS. Nuke it from orbit. It's the only way to be sure.