Not responding

 From:  xrok1
when using MOI, when i save or boolean, or do anything thats seems like intense calculations, with a fairly complex file; the moi screen goes black and the title bar say (not responding). if i click again i get the windows message not responding i then click 'wait for program to respond' option and MOI comes back after a few seconds.

can anything be done about this? i use vista premium if that helps explain.