Remember telling Ted in accounting that you'd get the Tuttle figures over by Wednesday morning? No? Well, Cortona does -- it can now read your emails and remind you of any written commitments. Microsoft revealed that the new tweak, and others, are now available in a new Windows Insider release. If you email your spouse promising to get cinema tickets, for instance, then Cortana will pop up to tell you so the next time you open up your PC. The feature works much the same as Microsoft's flight and package tracking, and data is kept locally unless you ask for a reminder. You can also opt out.