after install it worked fine now i cant restart it appcrash error, is there an vista compatible upgrade?
Vista has some built-in compatibility stuff. Did you try that? (http://lifehacker.com/software/vista/how-to-run-pre+vista-programs-in-compatibility-mode-251492.php)
Also it sometimes helps to run an app as administrator. 
tried compatible modes and running as administrator still no show!
read some were that changes in the header could cause this problem? maybe world machine does that too?
This is an unexpected problem – For myself, I haven’t yet tested compatibility on Vista, as I don’t have a copy here to play around with.
Is anyone else using Vista here, and either having problems or no?
solved it by installing the latest nvida drivers, it seems to work ok now.