in that case, it's file related.
Do you regulary run the following:
Spyware Checker/Remover
Defragging Software
Virus Scans
Cleanup Utilities
System Repair Utilities.
Do you have enough free virtual memory. SH2 can use upto 1.2GB of memory, either RAM or Virtual RAM. It maybe that SH3/Windows is trying to refresh the Virtual RAM while you are playing, that will cause a lockup, especially if you don't have enough to spare.
There must be a file conflict, corruption or deleted file which is causing the lockups.
Also, check your background processes for anything that maybe using your resources.
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