i've got the same probleme, when i load a ROM the program crash saying "nemu64.exe encountred a problem and must be closed..." sory for the impressison of the message but i'm frenche and i've some dificulties to translate
i'im runing under windows XP sp1 whith a p4M 1.9 and a geforce go 420
it run perfectly on my desktop running under windows 2000
thanks a lot for your help