Thanks Igor and Raman,
I read that article but it all seemed a bit complicated! Is that link for another CWS shredder type of programme?

And i have another question, i defragged my pc since having this virus and various programmes are now acting funny or not runing. do you think i should do a system restore before trying anymore fixes ( i have tried shredder, spybot and avast)? and do i need to disable system restore before i run all these scans (including avast).

Thanks for your help, much appreciated.