I have inadvertently aquired the above. Whenever is starts up I have managed to stop iyt using taskmanager and seemingly deleted it but it comes back again some hours later.
Will restoring to an earlier version of W8 get rid of it or is it more complicated than that?
Many thanks

I tried that but the particular file wasnt't found.
However, I did find in via taskmanager. I closed the tasks it caused to run and deleted it but after a few hours it came back. Theis happened a few times.
Eventually I simply renamed it and it seems to have stopped. However on reawakening my PC this morning, McAfee reported and blocked an unspecified trojan. So far the problem seems to have been resolved.