[NAME] You could try using the Event Viewer (Start/Windows Administrative Tools/Event Viewer) to look for something unusual in the various logs including the Windows Logs and the Application and Services Logs, 
Every morning after I boot up, the system [Win10 64 bit] locks up after 15-20 minutes and I have to power down and restart.  After this re-boot, the computer usually runs without problems all day.  The Windows 'reliability monitor' only tells me that the 'computer shutdown was unexpected' - nothing to indicated what caused it.  It would appear that there is something running or trying to run/load that fails - but, possibly,  it is only designed to run once/day.  Is there any log file that I can look at that might tell me what is causing the lock-up?
XPS 8910, locks up 15-20 minutes after booting up