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#11
That will be memory that has been used by windows and the data will be written back to the hard drive at some point. Even though the chart shows standby ram of 1 gb that ram will be full of data which can and is written back to the hard drive swap file.
This game like a lot of others needs a big swap file either a massive fixed one or let windows manage it. You could make things a little better by adding another 4gb of ram but ddr2 ram is not cheap.:)