windows crash

System: i7-6700 MSI Z170-A Pro ATX GEFORCE RTX 2080 SUPER 2TB SATA 3 TOSHIBA LC Power Supply P-4 550W V2.2 Kingston pomnilnik (RAM) HyperX Fury 16GB (2x 8GB) 2400MHz DDR4 DVD-RW SATA LG GH24NSD1 Windows 10 Home 64 bit If I have forgotten something important please let me know. Problem...

We supply some third party Windows 7 Delphi software to our customers. Recently, one particular customer site has started getting intermittent lockups/ freezes of the whole machine. All Windows event logs show is "unexpected reboot" and occasionally "PC shutdown unexpectedly at xx:xx" Apart...