First, please make sure you do not have any background tasks running which tie up your video acceleration. This includes Microsoft NetMeeting, Remote Desktop, etc.
Press Ctrl-Alt-Del once and go to "Task Manager" and go to "Processes" and close every task that it will allow you to close. Then try to run the Aquarium. If it now runs smoothly, then one of the programs you closed was preventing the 3D chip from working.
If this still does not work, please visit
http://www.fujitsu.com/ and see if there are newer Display Driver Downloads for your laptop.
Could you please give us a model number on your Fujitsu?
Once we have your model number, we could get you the exact driver download link.
If you wish to try to install the "standard" S3 ProSavage drivers. To do this, please
visit our Help page (look for ViRGE, S3, ProSavage Drivers at the bottom).
WARNING: If Fujitsu has made any changes in the ProSavage hardware, these drivers will not work! Please consider this step a "last resort".