OK - I already had hardware acceleration disabled for Aurora, so will actually try with it to see if that helps. My graphics drivers are also up to date, so it might simply be specific to certain games? It's very strange and certainly not representative as the majority of the time Aurora is flawless (and awesome!).
How much RAM does your PC have and how much RAM does your video card have? Also, what is your system virtual memory set to? Only asking as that the error specifically says "Out of Memory".