Windows 7: Problem with Windows Live Movie Maker 15 (Beta) Installation

Hi, quite like the ribbon style of Windows Live Movie Maker 14.
The other day I decided to install version 15, but during installation I get the follwoing errors:



Translation: There is a problem, please wait until we restore the previous state.

... resulting in this:



Error code: 0x80070643

Apparently many people have similar problems but always with different error codes.



My OS is Windows 7 x64

Any ideas pls ?