I decided to install Windows 10 off the site I think? I didn't use any installation media, I remember that much. I got a new laptop recently so I've been trying to clean install my old one to give to someone else since it's still in pretty good working order. You can help protect yourself from scammers by verifying that the contact is a Microsoft Agent or Microsoft Employee and that the phone number is an official Microsoft global customer service number. Tech support scams are an industry-wide issue where scammers trick you into paying for unnecessary technical support services.