World in Conflict requirements
OS: Windows® XP, Windows Vista™
Processor: 2.5 GHz or faster
Memory: 1024 MB (1.5 GB for Windows Vista™)
Graphics: 256 MB video RAM, DirectX® 9.0c-compatible
Universe at War requirements
Supported OS: Windows Vista®/XP
Processor: 2.8 GHz
Memory: 1 GB system RAM
Graphics: DX9 compliant card (ATI X800 or NVIDIA 7600)
Dawn of War requirements
OS: Windows XP SP2 or Windows Vista SP1
Processor: P4 3.2 GHz (single core) or any Dual Core processor
Memory: 1 GB RAM (XP), 1.5 GB RAM (Vista)
Graphics: A 128MB Video Card (Shader Model 3) - Nvidia GeForce 6600 GT / ATI X1600, or equivalent
You've got Vista, you've got a Dual Core, your ram isn't enough, and you've got an integrated... thing which I doubt is enough. These are minimum requirements I'm assuming as well.