Hi martink,
I'm not sure If your problem has been solved but here is what I can update you with 64 bit OS from Microsoft...
We get some weird errors like
\ATI was unexpected at this time or \Microsoft was unexpected at this time etc
The problem mainly is with the path environment varaible..
Edit your path and find for the string "Program Files (x86)" and replace it with "progra~2"
After saving it, everything will be fine..
Hope this helps -_-
Cheers,
Ritesh