Microsoft has already taken some potshots at Google's Chromebooks in the past -- Windows 8.1 with Bing, anyone? Now, though, it's going for the jugular. The newly introduced Windows 10 S (not Cloud like the rumors suggested) is a stripped-back, education-oriented version of the operating system that gives up some app support in the name of simplicity and performance. You can only run Windows Store apps (including Office 365 apps, which are coming soon), but that's the point -- schools don't have to worry about the vulnerabilities that come with running any old Windows app. Store apps run in a relatively safe container where malware and other threats aren't likely to be an issue.