Hiya!
Unfortunately i'm a 'Discarded Textures Club' member too.
My environment is: CPU Pentium® Dual-Core E5200 2.50GHz RAM 4GB - OS Version: Microsoft Windows 7 32-bit Service Pack 1 - Graphics Card: NVIDIA GeForce GTX 650 – 2GB (GDDR5).
I’m not very used with all these PC thingies but I can say my comp surely cannot be a monster but imho is good enough to handle SL.
For what I can remember I never had this issue before the FS 4.4.2 version and funny thing is…I never seen that cursed message with my previous GC, a simple ATI Radeon 4300 Series with only 512 MB … LOL!