Hmm, I booted in the protected mode. In this mode my Lapy is fully functional. I think my hardware is intact, so it must be a software problem. I did the following thing:
I saved my personal data during the protected mode session and then I used the recovery-DVD to set WinVista back to originals.
My Lapy is working right now and I must say, much faster than before, for example before this happens it takes about 5min. to shut the computer down, now hardly 20 sec. And it took ever about 5min. to shut my Lapy down....
Just for fun:
Does anyone know what happens? I opened the process explorer but I saw nothing unusual, when my Lapy was/is crashing. And why does it work in the protected mode properly and when I boot normally not? Maybe does it have something to do with an update of WinVista, which I previously installed?