This is what the scam email purporting to be from Microsoft looks like. Don’t fall for it.First and foremost: If you’re a Windows 7 or 8 user, Microsoft will not email you to upgrade to Windows 10. If you do get an email along those lines, it’s probably a scam and if you download what’s inside, bad guys could hold your computer’s files for ransom. Cisco Security’s Talos researchers discovered a new scam email, involving what’s known as ransomware, going around that offers to upgrade computer users to Windows 10 for free.