I keep looking at this thread and wondering about it. If you look on the GC3 forums you might, if you go back far enough, find that some people had trouble with the minimum required RAM there as well (4GB RAM). Some people said to turn off the swap file, but that caused worse problems.
As I look at the 2GB minimum RAM requirement for SK and the amount of RAM that gets allocated when I boot my PC (2.7 GB on Win8.1 with 64 bit addressing), I am further puzzled. Granted, a lot of the operating system can get paged out to the swap file, which might be enough to allow SK to play on 2GB RAM, but there would be page swapping delays at times while this happens. It would be worse if the OS allocated the swap file expansions in small chunks. (Many on GC3 with low amounts of installed RAM noticed delays that looked like hangs when zooming in or out on the main map.) The size recommendations from MicroSoft for the swap file
(also called the "virtual memory" settings --- control panel -> system -> advanced system settings -> performance: settings -> advanced -> Virtual memory: Change)
are, minimum size (or initial size) = 1*RAM, maximum size = 3 * RAM, or to allow the OS to handle it all by itself. I have a suspicion the OS doesn't handle game requirements well on its own, but someone with only 2GB could check this out (I have 16GB, -- two 8GB sticks -- so I can not do this) and let us know what they find.
It should also be noted that the OS uses the swap file for more than just backing up virtual memory.