Always nice to see that I'm not the only one SH1 fan left !!
I have the SH4 collector's version, the one with the brown two-sided box, map, manual, audio CD with the game music, e.t.c.
I used 1.1-1.2 patch, before turning back to SH3-GWX, then 1.4, then purchased the U-boat missions expansion, in hope of a Japanese campaign mod. Imagine my joy when I saw Peabody's and Keltos's efforts to create one !!
One can see through my PC case from the left side, and I clearly see a red light on top of the VGA. The light flashes twice when you turn on the computer, then it shuts off.
When the system hangs, (no Alt-Tab, Ctrl-Alt-Del, nothing works, only reset button), the red light on the graphics card stays on. Only after you restart the computer flashes twice and turns off. That's why I think it has something to do with graphics. Something forces the GPU to stop working, and in result, the whole system.
I thought that I may have a defective card, but this crash occures ONLY in SH4

. Otherwise, it runs smoothly and VERY fast.
I also want to note that I never "play" with overclocking. Neither the GPU nor the CPU. Tonight or tomorrow night, (depends on my job time), I will re-install as noted, and post (hopefully) any good results.
Billy, over and out!