It just started happening, no hardware or software has been installed. They mostly seem to be fundamental Microsoft system files causing the crashes. Once or twice the fault was caused by the Ethernet controller, so I updated to the latest drivers for it. I swapped out the RAM, the graphics card and the PSU to no avail. It is a business PC mostly used for email, browsing and Microsoft Office. It has MSE which shows no viruses. The Windows firewall is enabled. I have attached the text file showing the dump info from BlueScreenView.