Morning / Evening All, This question has been asked before, but I am unsure of what could be causing this system hang and reboot (only if I'm lucky - otherwise it just hangs) It is looking like a driver conflict, but as far as I am aware, and have checked as far as I can - all drivers are updated (and have checked some old ones too) - but nothing seems to be out of place. Two PSU's have been tried - both work fine in another machine, same with RAM and CPU - but the problem persists. Event ID: 1003, Category: 102, Source: system error Error code 100000df, parameter1 faeeff2e, parameter2 00000002, parameter3 00000000, parameter4 faeeff2e. I've got a few dumps, but am at a look on how to read these (any pointers ?) Anyway, thanks for your time for reading and any information would be very well received !