So I was rummaging around in RF, when suddenly my computer shut down & started installing Windows 10. As this unexpectedly & automated process takes place, I'm on my phone now.
Weird.
There's an option for you to disable automatic install and do it manually.
[Edited] Actually, I missed the true context of this. MS is forcing folks to 10. Windows 10 isn't so bad. I like it more than previous windows but yes, you'll have to get used to the new interface.