Open Powershell with administrative permissions:
PS C:\Windows\system32> get-appxpackage -AllUsers *onenote* | Remove-Appxpackage
PS C:\Windows\system32> get-appxpackage -AllUsers *messaging* | Remove-Appxpackage
PS C:\Windows\system32> get-appxpackage -AllUsers *sticky* | Remove-Appxpackage
PS C:\Windows\system32> get-appxpackage -AllUsers *soundrecorder* | Remove-Appxpackage
PS C:\Windows\system32> get-appxpackage -AllUsers *maps* | Remove-Appxpackage
PS C:\Windows\system32> get-appxpackage -AllUsers *zune* | Remove-Appxpackage
PS C:\Windows\system32> get-appxpackage -AllUsers *weather* | Remove-Appxpackage
PS C:\Windows\system32> get-appxpackage -AllUsers *people* | Remove-Appxpackage
PS C:\Windows\system32> get-appxpackage -AllUsers *photos* | Remove-Appxpackage
PS C:\Windows\system32> get-appxpackage -AllUsers *camera* | Remove-Appxpackage
PS C:\Windows\system32> get-appxpackage -AllUsers *alarms* | Remove-Appxpackage
Using the following will pull the list of app packages into a text file:
PS C:\Windows\system32> get-appxpackage -AllUsers > C:\Users\Me\Desktop\all_packages.txt
Take care not to dunk on all packages at once, as the unfiltered list includes possibly important subsystems like .NET frameworks.
The following will try to uninstall every Windows App (and will fail on some of them) removing anything not bolted to the ground by Microsoft:
PS C:\Windows\system32> get-appxpackage -AllUsers | Remove-Appxpackage