I think your hard drive is to full, & SH4 is best w/2 gigs of RAM. Should you burn clean install directories to disc, you should recover some space, after deleating same.
This could be a Direct X install glitch, also.
If I want a clean install, it always comes from UBI game disc.
see link:
http://www.subsim.com/radioroom/show...64&postcount=3
Ruahrc Following the lead re: the DirectX thing, I did find a Directx folder in the SH4 directory, and ran the setup file located within.
Launched SH4, worked!