How to fix "Broken" Store Apps, Deployment failed: 0x80073CF6 & Merge Failure: 0x80070003 problems in Windows 10. (Solved)
In a Windows 10 machine, after November Update 1511, the Start (Windows) button freezes and Cortana does not work. (This behavior is a common bug after Windows 10 1511 update that Microsoft has not fixed yet).