Originally Posted by
Wevenhuis Maybe it's good to know that you can also revert back to windows 8.1 on your surface pro. I am currently also testing windows 10 on my surface pro first gen. The technical preview already provides a revert to 8.1 at the startup of the OS. Before installing windows 10, the microsoft website also shows and tells you how you can make a recovery flash drive for windows 8.1 for your surface pro device. If you did that before installing and now know that the preview provides a revert option, you can go two ways: forward to an official windows 10 in due time or back to windows 8.1 which is still a very good and powerful operating system for the surface pro.
We must have Win 7/8/8.1 installed on the computer, to upgrade to Windows 10.
For the OP : Nothing to worry. Your Surface will be updated to the completed version Windows 10.