Thanks, guys. Yeah, it was probably alt+tab that caused the crew under water, I did that to see if running the game on one core would cure the stutter.
Btw, the stutter is not caused by background processes, it happens at steady fps for no apparent reason, and ONLY in SH4. I run other demanding games like Empire: Total War maxed out with no issues, I just dont understand this. The install is fresh on a freshly defragged HD on a recently installed XP Pro SP3 with latest drivers and updates, loaded with Operation Monsun.
Anyway, I have had this before - lowering settings doesnt do anything other that raise fps well beyond 100 - and it might be what made me uninstall SH4 ages ago.
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