Your PC is secure the first time you start up Windows—but it doesn’t always stay that way. You can make mistakes that break that protection. Cybersecurity experts see a lot, and as a result, they know exactly how people get themselves in trouble. When I spoke with folks from Microsoft at this year’s RSAC Conference formerly known as RSA, they had quick answers for what the biggest issues are. That included three particular habits that cause a world of hurt, according to David...
