The community is trying to help, but we can't see your system and are effectively operating blind. My advice would be to delete your Anim8or instance and do a fresh download, copying the program to your desktop. Right-click the Anim8or icon, go to properties, and choose the Compatibility tab. Select the options to run in Windows XP (Service Pack 2) and in the Settings section tick only the 'Disable desktop composition' checkbox. Click Apply or OK and try running Anim8or. I'm running W7 Home Premium 64 bit and with the above settings Anim8or has been completely stable. If it still won't run for you at least you've eliminated the OS as the culprit, in which case the previous advice given re drivers is really all you can do.