I have been working in the IT industry for over 30 years, for most of this time as an editor at PC-WELT (PCWorld’s German sister publication), specializing in security. I test antivirus software, give tips on how to make Windows more secure, am constantly on the lookout for the best security tools, and monitor the activities of cyber criminals. Over the years, I have acquired a whole range of behaviors and principles that seem completely normal and sensible to me. However, when I observe other PC users, I often discover risky or at least less security-oriented behavior. That’s why I’ve put tog…