Not too long ago, password managers were just nice to have. Now they're essential. In Short Circuits: Computers and the Internet are changing how we interact with the nation's health-care system and the latest version of Windows 10 in the Fast ring merits a yawn, but that's not a bad thing. In Spare Parts (only on the website): Scammers are now targeting children and China-based WeChat handed out money (with an ulterior motive) in Times Square around the Chinese New Year.