You are running a preview build the general public does not have access to. The only build we can use right now is build 9860. You are running build 9868 which I assume you have access to because you are a Microsoft employee.
You can try the following to see if you can upgrade to whatever higher build you have access to:
Make sure you install the latest updates for Windows 10 build 9868 first.
Make sure you have full administrative privileges
If you are connected to a domain, switch to a local account
Disable your Antivirus utility before attempting the upgrade
Do a clean boot and try again
Close all open programs and make sure that PC Settings is the active window while the download completes, I notice if you switch to something else, the download will time out and fail
If you are updating over Wi-Fi, try switching to a Wired Connection.
Make sure Windows 10 is activated.
If you have any external devices attached to the machine, disconnect them (example, USB keys, external hard disc, printers, non-essential devices).
Best, Andre Windows Insider MVP MVP-Windows and Devices for IT twitter/adacosta groovypost.com
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