Many built-in Intel graphics cards cannot run Wurm well. Even with low details the frame rates are still low.
Sometimes the terrain will show a kind of red shadow. This can be fixed on Windows XP by installing the latest graphics card drivers from Intel. Version 5248 of the Windows XP driver and version 2291 of is known to fix the red terrain. The current Windows Vista/Windows 7 drivers are known to fix do still show the red terrain.
Some laptop manufacturers do not provide updated drivers so you may have to uninstall the manufacturer supplied driver and install the latest driver from the [http://downloadcenter.intel.com/ Intel website].