So, I was not able to boot Windows 7 anymore.
Neither in normal and safe mode.
Being lucky having a Samsung, which has this backup function (Creates an image of the PC when it was in the first state, when bought from the store).
Nothing else working I did the backup, and now I'm on Vista.
I was wondering should I stay on Vista? How is it improved, by means of compatibility and such.
Or should I just upgrade to Windows 7 again?
I still have my key, but no CD, so I can just download Windows 7 again, which will take a while.
Also, how do I disable this annoying thing that warns me for every single thing I try to do?