Hi there. I'm trying to upgrade to windows 10 but for some reason it will download, but when it go's to installation it starts but then fails and comes   with error code 800703f1. any help or advice would be appreciated.

The media creation tool can be used to upgrade your current PC to Windows 10

Hi eliset,

Thank you for your question. 

In addition above suggestion, please make sure Windows has been activated before we upgrade it to Windows 10. Then make sure all driver to the lasted will be convenient for us to upgrade it to Windows 10.

We could refer to the following link which is about error 800703f1 when upgrade to Windows 10:

https://social.technet.microsoft.com/Forums/en-US/fb8be212-1fbd-4796-af1d-461c472263a0/windows-81-cant-install-updates-error-code-800703f1?forum=w8itprogeneral 

If there are any questions regarding this issue, please be free to let me know.

Best Regard,

Jim