I've been having problem with playing almost any games on VPC. Including Half Life 2, Counter Strike, WoW, AC2, Half life 1, Doom 3, Need for speed, and Halo. Tried almost everything i have/had -=O .
As what Rich says is right it doesn't support 3D graphics.
VPC limits everything. Starting with processor speed, memory (which can be changed), hard drive space, and graphics card.
I'd have to agree of what you heard that its mainly made for software like word and other microsoft programs.