Original tweet owner here. This functionality is locked behind a feature control mechanism, in a pre-release version of Windows 10. The feature is named BlankD

Original tweet owner here. This functionality is locked behind a feature control mechanism, in a pre-release version of Windows 10. The feature is named BlankDocOfficeUpsell. The feature control mechanism is used by Microsoft to gate potential features in public builds for various reasons (e.g. experimentation). Using tools I wrote (https://github.com/riverar/mach2 https://github.com/riverar/mach2), and public debugging symbols, they can be manipulated on/off and is usually a good indicator at what's coming in a future Windows release. This particular feature upsells Office online via a yellow bar, not unlike the Message Bar in full Office applications. The Message Bar is typically used for important security warnings and alerts [1], presumably one reason this particular design was chosen. At this time, the upsell notification can be closed but that action is not persisted -- the ad will re-appear at next WordPad launch. This could change but that's not a guaranteed pattern (see: permanent PowerShell Core ad in PowerShell). [1] https://support.office.com/en-us/article/Enable-or-disable-security-alerts-on-the-Message-Bar-ADBF15D9-9195-4498-BDC3-5CB0DFE93852 https://support.office.com/en-us/article/Enable-or-disable-s...