I haven't heard of anyone else using Windows
8 yet, so you
might have found an incompatibility issue. (Lucky you!) But there is a utility called Large Array Aware which allows programs running under Windows Vista or 7 to access more than 2GB of RAM. It seems to fix most of the CTD problems reported on this forum. I don't know the url. Or try "4GB Fix for SH4":
http://www.subsim.com/radioroom/down...o=file&id=2889
It solved my CTDs (under Windows 7, though).