My desktop pc from PCSpecialist is about 5 months old and recently on three separate occasions has switched itself off after being left unused for a while. When the machine is restarted Windows says that it has recovered from an unexpected shutdown but then everything works normally.
Usually when left unused the machine goes to sleep and a movement of the mouse reawakens it.
I use Norton antivirus and have not altered any settings that I am aware of.
Can anyone suggest reasons/solutions for this unexpected shutdown behaviour?