I have several systems using the ASUS P4P800 MB. When I issue a 'reboot', they shut down cleanly. They then stop after the 'uptime' line and hang. If I remember correctly, this started happening between 5.2-R and 5.2.1-R. I have a test box that I can take down at any time. I just need some guidance on how to troubleshoot this. TIA Elliot