This is an old revision of the document!
http://www.howtogeek.com/224111/how-to-use-packagemanagement-aka-oneget-on-windows-10/
http://blogs.technet.com/b/packagemanagement/archive/2015/05/05/10-things-about-oneget-that-are-completely-different-than-you-think.aspx
In PowerShell, install the module:
Get-Command -Module PackageManagement Get-PackageProvider Get-PackageSource
Use these commands to register or unregister
Register-PackageSource