I was crashing my PowerDVD XP left and right until I read somewhere here that Hydravision was possibly the cultprit. So I "unload" it from memory and then uninstalled it using Add/Remove Programs in Control Panel (Win98SE) and it solved my instability problems--well most of it as it's still ATI drivers you know This may help some of you. You can still "hot key" to switch the dual heads feature. Thus, Hydravision is not critical in HT usage. It may apply to multiple monitor applications (spreadsheet on one monitor and web surfing on the other).