1. Try using the "Basic" AttractMode layout/theme to troubleshoot and see if your problem goes away. If it does, there and issue with the layout/theme.
2. Check your AttractMode video decoder setting to see if you're using hardware or software decoding. Try each setting to see if it fixes your issue.
Configure-->General-->Video Decoder
3. Check your OS video/display adapter driver, it has a chipset even though it's "on board". Make sure it's correct for your computer and the latest version available from the manufacturer. Depending on how your OS was installed you could be using a Microsoft standard/basic driver that works fine for most things but not everything.