Today I tried the system restore to the restore point JUST before I tried to install SP2, but it ALSO failed and brought me back to the State. I think that something could have gone wrong and that's why it shows this message. This error started showing when I tried to install SP2, but he failed and returned to changes. He comes back every time you start, after that the background, shortcuts and the system tray loaded.

I tried searching on the net for similar problems, but I could not find any solution. Later, I started my Vista (automatically restored to SP1) and it came with a mistake, 'Microsoft Mobile PC presentation adaptability Client has stopped working'. I tried all the resolutions posted, but it is not always correct it. I recently tried to install SP2 to Vista, but it failed. Startup error message: 'Microsoft Mobile PC presentation adaptability Client has stopped working'.