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Laptop Graphics Cards
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Some laptops have a built in Intel graphics card working alongside a more powerful dedicated Nvidia or AMD/ATI graphics card. You can select which one to use depending on how much power you want to use, e.g. If you're just doing spreadsheets you use the lower powered Intel chip.
Symptoms
Poor frame rate or failure to start. You should know from your laptop spec's if you have more than one card.
Solution
The solutions to this problem vary depending on your system and graphics card, but here are the common ways to set your system to force it to use the best graphics chip for the demo.
Method one:
1. Open the control panel for your graphics card (most have an icon in your system tray, or right-click on your desktop and look for a graphics control panel option there).
2. Check under 3D settings, and make sure your best graphics chipset is set as the preferred chipset if there is an option available.
Method two:
1. Exit Steam entirely using the 'Exit' link on the 'Steam' menu (not just the close button in the top-right corner of the Steam window).
2. Right-click on the 'Steam' shortcut you use to launch Steam (on your desktop, taskbar, or start menu, depending on where you have it), and look for an option that says something like 'Run with graphics processor...' and allows you to choose which graphics chipset to use.
3. Choose your best graphics chipset.
4. Launch Steam, then launch the demo as normal.