After I installed Minecraft from the .msi I started it, but it didnt work.
The Loading bar moved to 0.5/1.25MB and then an error notification popped up and said: "Unable to update the Minecraft Lauchner!

In the nativelog.txt:
Das Zeitlimit für den Vorgang wurde erreicht. = The time limit for the operation has been reached.

NOTE:
I found only one Bug about this subject report on this site, but there he said that it were fixed when he had downloaded the Minecraft.exe, but this didnt work for me, I always got the same (appended) nativelog.
In the other Report there was also a different error in the nativelog.
If the english is not the best, excuse it, i'm german.