it means you don't have a graphics card that supports pixel shader 2.0. and make sure you have an actual graphics card and not an integrated one, intergrated graphics cards are useless for gaming with.
my Dell laptop came with a 2GB Nvidia Geforce GT 525M graphics card.
from what i've read. Nvidia Geforce series: FX5900 or better and all Nvidia G, GT, GTS, GTX video cards. ATI Radeon 9500 series or better. X300, X600, X700, X800, X850, X1300, X1600, X1800, X1900, X1950, 2400, 2600, 2900, 3450, 3650, 3850. 3870, 4850, 4870 and 4890 series or better are supported to play Sims 3. Geforce 6100 and 7100 cards are not supported. Nvidia Geforce FX series are unsupported under Vista. Nvidia Geforce 7300 is unsupported under Snow Leopard (Mac OS). Sims 3 will not run on PowerPC (G3/G4/G5) based Mac systems, or the GMA 950 class of integrated video cards.
I have windows 7 on my Lenova laptop and the PC download works perfectly plus NO disc to worry about patches are instant and I love playing sims 2 on my laptop. Just go to Amazon and order the PC version digital download, really doesnt take up much room on your harddrive. Pay and Download your game you can download on up to 5 different computers and your phone. Hope this helps I love it and I am not a computer whiz just a dedicated Sim Fanatic. YOU will love sims3 download. as a note sims 2 disc does not open on my laptop, but no problem with sims 3 download