Hi [NAME],   The error in the screenshot points out that the CPU has detected an error in the system. Please follow the below steps which may resolve the issue.  
hello. I'm using Windows Server 12R2 on my R740. The server, which was running fine, suddenly rebooted. The hardware is in good condition and I'll attach the remaining contents to the iDRAC log. There are no logs left in the OS either. Is it a simple bug? OS crash? It's normal now. But it rebooted and I had to submit a reason, but my head hurts so much. Let me know if you have any experience like this. thanks [IMAGE]  
R740 Abnormal Reboot Question