I’m a PC security expert. These are the 5 dumbest mistakes I’ve made

Here is a 191-word summary of the news article: The article is written by a PCWorld editor who shares five dumb security mistakes they've made over the years. The first mistake was using public Wi-Fi without a VPN, potentially exposing their personal data. The second was leaving their desktop PC unlocked and accessible to strangers. The third was using only a username and password to secure sensitive online accounts, leading to a compromised Dropbox account. The fourth mistake was using a friend's portable hard drive, which turned out to be infected with a virus. And the fifth was not upgrading to Windows 11 when they had the money, leaving them stuck on the soon-to-be unsupported Windows 10 after October 2023. The article serves as a cautionary tale, highlighting common security pitfalls and emphasizing the importance of practicing good cyber hygiene, such as using VPNs, strong passwords, multi-factor authentication, and keeping software up-to-date. The author's personal experiences provide valuable lessons for readers to learn from and improve their own security practices.