Bob...........
This problem was on a friends PC but today I was over there and he had deleted the file from the chest !!!
However, I think it was from a temp file in the cookies section on his I.E.
I scanned with Avast and all was clear of 'nasties' - I also scanned with Malwarebytes and SuperAntiSpyware and again all is clear and clean.
Sorry :'( I cannot help with anymore information as I have not been able to send the offending file for verification of being an FP (due to my friends rather hasty action of deleting it !!)
Hope you get yours sorted soon - I will keep an eye on it.
tb39