We are in the process of deploying a number of Dell Latitude e5550's with Intel core i5-5300 dual core processors. All have 8 GB of ram.  Most deploy fine and we never hear back. There is a small subset of these machines that randomly freeze and must be restarted to recover. I can not reliably reproduce these errors. 

I upgraded the Bios from A05 to A06 with no change. I recorded the DCOM configuration to account for the dcom errors in the event viewer. No bad sectors, no file errors. I scanned for any malware. the system is clean and healthy. 

So far I have been unable to narrow it down to a specific app or service. The few that are returning are doing different things at different times. I have researched this, but there isn't much out there for this issue.