The SW2004 SP0 seems to work fairly decently on the HPCompaqdx2250 (Athlon 4800+) 2GRAM & XPPro with it's integratedATIx1150 graphics card and small assemblies. However, afterIinstalled the newer ATI Catalyst 7.8 and 7.9 display driverswhichsupport OpenGL, there is now a noise which I wonder if itisharmful. The noise is the most audible in the sketch mode wheneverthe selection changes from an item to another, edge, line,axel,face etc or if zooming in and out. Drawing a circle andchangingit's size with dragging causes it too.I'm almost sure thesoundcomes from the HD, not the speaker. Anyone encounteredanythingsimilar and know what this is and if there is a cure if oneisneeded? I suspect if it is the HD this will ruinitprematurely?Thanks,RistoSolidworksAdministration