When I researched Genius Versions I only found pirate and cracked versions of this OS.
We can't discuss those here so I'll leave it as "Start over."
Locking this thread.
I have installed, by mistake, in a 64-bit:
a). Win.7 Ultimate in (C)(not genius version) and also
b). Win.7 Home Premium in (D).
How can uninstall safely both of them and install Win.7 Home premium in (C)?