Andres - have you tried what others have posted (skip the Microsoft nonsense)? I suspect a complete re-install would be massive overkill - sort of like trading your car instead of fixing it - silly.
The update hang is very inconsistent - one suggestion works for some but won't work for others. Scroll up to find my name (last post with details). In my research, I had already concluded that a re-install has bat crap crazy and an intellectually lazy suggestion. But I documented above that one idea was just to skip the troublesome update altogether. This seemed reasonable to me, and it proved to be straightforward to complete. Try it.
cg