I think you answered your own question.Your laptop probably isn't designed to play Dawn of the Dead. What are the minimum requirements of the game, and what are the specs of your laptop. (This is a rhetorical question)
http://dawnofwar.filefront.com/info/RequirementsHere you can find what the system requirements for Dawn of War are. The game does not require a super computer but for a good performance you will need a decent computer.
The minimum system requirements are as follows:
# Windows® 98/2000/XP/ME with Direct X 9.0b (included)
# 1.4 GHz Intel Pentium III or AMD Athlon XP processor
# 256 MB RAM
# DirectX 9.0b compatible AGP video card with Hardware Transform and
# Lighting and 32MB of Video RAM
# DirectX 9.0b compatible 16-bit sound card
# 4x CD-ROM drive
# Keyboard and mouse
The recommended system specifications are:
# 2.2 GHz Intel Pentium 4 or equivalent
# 512 MB System RAM (required for 8-player multiplayer games)
# nVidia GeForce 3 or ATI Radeon 8500 or equivalent with 64 MB of Video RAM
For multiplayer, the following are also required:
# 1 disc/player per computer
# Internet: Cable modem, DSL or 56.6 kbps modem, for online multiplayer play
# Network: TCP/IP compliant network.