This could be related to the new DEP (Data Execution Protection) features that Microsoft added to SP2 to help protect against buffer overrun type security attacks. The Athlon 64 supports hardware DEP and it is turned on by standard. To test if this is the problem you can take the following steps to disable it for Vue. 1. Right click "My Computer" and choose properties from menu. 2. On advanced tab click "Settings" button 3. Select "Data Execution Prevention" tab 4. Select the radio button for "Turn on DEP for all programs and services except those I select" 5. Click the "Add" button and browse to your Vue program file and click OK 6. Vue will now be in the list of excluded programs with a ticked checkbox beside it. 7. Click OK then OK again to close the dialogs 8. Reboot the computer. 9. See if Vue runs now. I have an A64 running XP SP2 myself and so far have had to disable DEP for 3 programs (including Windows Explorer which was crashing when showing video thumbnails). However Vue 4 Pro runs fine on my machine so this may not be the reason for the Vue 5 problem your experiencing. -- Mark

Mark