Update from Surface Pro 3 to Windows 10 did not succeed.
Update from Surface Pro 3 to Windows 10 did not succeed.
It seems your Surface Pro 3 got stuck after the Windows 10 update. You tried installing it from a USB drive, which you know how to do, but now you're unsure whether additional drivers are needed. Check the manufacturer's website or contact their support for guidance on required drivers and steps to resolve the issue.
Press and hold the power button for a few seconds to force shut down the Surface, then restart it. It should begin operating again.