Please make sure you have the most recent updates to Windows 98, including Second Edition, etc. Before I upgraded to Windows 2000 I had similar problems under Win98 but don't anylonger. Also make sure that all the tasks running except the one's you can't kill (hit CTRL-ALT-DELETE to bring up the Task Manager) are dead. Lastly, if you are rendering to disk make sure that the disk is defragmented. Beyond that.... :-( TomD