You don't need to import the module in Windows 10. Check this: hxxp://blogs.msdn.com/b/garretts/archive/2015/01/27/oneget-and-the-windows-10-preview.aspx
Simple bug to reproduce. Go to All Apps Click a letter Click Back button or close Start Menu Click All Apps
Thanks man , you are right , but this command still give me nothing " get-command -module oneget " any ideas ??