All appears to be fixed thanks. Will heed your advice re mwareb. The PUP concerned as I remember was an Ad aware, now this is worrying because it came from an Add-on via Firefox. In more detail what happened was I would open the beeb page, click on an item of news and another page would open over the page wanted. This then stated it was a coupon drop down alleging it would save you money on shopping. I think this is a similar worm to the Sweetim and Blecko hijackers.Hope this helps.
I originally stated it wasn`t an Add on from Firefox, but I must have been incorrect.