I'm working toward upgrading my wife's ThinkPad T420s. I want it to go smoothly (which I fully expect) and quickly (the subject of this post).
To make it go quickly my idea was to have the latest Windows 10 bits downloaded. To do this I ran the Windows 10 Media Creation Tool.
I had used the Media Creation Tool before. But this time it was different.
I tried it on a new PC. One where I had taken my own advice and made the default user NOT an administrator.
The tool downloaded successfully and ran through its first couple of screens asking for the administrator's password. I'm not sure why it needs administrator rights but anyway...
Then I gave it access to the USB drive I wanted to use for my fresh media.
There was a problem running this tool. We're not sure what happened, but we're unable to run this tool on your PC. If you continue experiencing problems, reference the error code when contacting customer support. Error code: 0x800704DD - 0x90016.
"We're not sure what happened?" C'mon Microsoft. Nobody but you can know what happened.
So I started searching Google for this and came across this.
The net of this is that to create a USB drive you have to run the Media Creation Tool while logged in as an administrator.