I have just built a new PC. Quad 6600 4 gig ram, Vista sp1. Itunes, winpwn No other winpwn versions were ever installed.

Task manager reports the machie not even breaking sweat when winpwn runs so it's not a mem issue?

When I build the custom ipsw file with Cydia or installer clicked it just shuts down no error just closes.

If I build the file without cydia or installer clicked it builds ok.

Anyone any ideas please?