OK i ran Verifier and PC BSOD after approx 10mins of normal use.
i dont log in to my pc when i boot up, and i have admin rights but the system tells me i do not have the necessary permissions to zip or open the dumpfiles ?
The PC has now revealed a 2nd symptom in that it occasionally locks up, the monitor goes into standby, keyboard stops functioning, (ie cant get caps/num lock to light up) and PC can only be reset by switching off the power (reset and power buttons do nothing)
My PC supplier told me they had the machine running loadtesting apps for 2 days when i sent it back previously, and suggested i use a different keyboard/monitor and unplug any other devices.
This has made no difference.