Got the following from an attempted upgrade from W8.1 to W10
Upgrade to Windows 10 Home
Installation date: 9/10/2015 4:35 AM
Installation status: Failed
Error details: Code 80240020
Update type: Important
Install the next version of Windows.
More information:
http://go.microsoft.com/fwlink/?LinkID=507415Help and Support:
http://go.microsoft.com/fwlink/?LinkId=507417
What gives?