A new, fast-moving worm is knocking out Windows 2000 networks. And this just a day after Zotob appeared. Looks like (virus-writing) school is back in session! (Watch our Security Center for updates.) iOS 13 comes with new Siri voice, dark mode, privacy features: All the new software Apple will soon deliver to your iPhone. Best power banks and battery packs for Android devices: Looking for a pocket-size power bank for charging your Android smartphone on the go? Here are some top picks.