Didn't lose my dual boot into Linux. I'm surprised.
Did lose my Solidworks, Open Office and antivirus installs. They are all there file-wise, I had to re-do the "set-up" programs for them.
I did a "new install" over a corrupted version of Windows7. It came out better than I was expecting.
Did the "upgrade" on my laptop. Other than taking twice as long as the "new" no problems.
MUCH better (so far) and a considerable bit faster than 7. Not quite Linux type speed but it's getting there.
Of course it's early yet.