Microsoft released a Windows 10 Build 10041 earlier this evening. The new build brings transparency to the start menu and introduces some new UI changes as well. However, as you may have already noticed, the Mail, Calendar, and People apps on this build is broken. Fortunately though, Microsoft is aware of this issue and has offered a workaround. To fix this issue, just follow these steps:
► Open powershell as administrator
► Run the command
Get-appxprovisionedpackage –online | where-object {$_.packagename –like “*windowscommunicationsapps*”} | remove-appxprovisionedpackage –online► Re-install Mail, People and Calendar from the Store (green tile)
We’ve created a GIF for this process to make it much easier for you to fix this:
source:microsoft-news