Using Windows Vista, running cmd, makes it hangs for some seconds and then start.
I solved the issue removing any additional keyboards layouts from:
“System Settings->Region and Language options->Keyboards & Languages->Change keyboards”
see http://serverfault.com/questions/26217/win7-command-processor-cmd-exe-really-slow/210961#210961
[ITA]In Windows Vista ho notato un rallentamento dell’avvio della console (CMD). Lasciando un solo layout di tastiera il problema si รจ risolto