Hi, I've followed your instructions now. I ran housecall and pandascan which found a few things of which housecall managed to remove some. Then used look2me remover (log attached) and vundo remover. Didn't see anything there to cause concern. Then I ran smitfraud fix in safe mode which caused some consternation as it seemmed to take ages...on checking in task manager it appears that several instances of regedit were trying to be run at the same time and cycling between running/not running and the instances appearing in different places in the list of processes. What's that about? Anyway I did the clean and reboot for that (rapport log attached). Then I followed instructions for trojans and begintosearch etc. and did the Ewido scan. (scan log attached). And now here I am with the HJT log attached too. So far I'm still scratchin my head over why I can't get regedit to open after having done all this. Would be extremely grateful if you can help. cheers, Simon PS...also followed your additional security advice 'prevent infections...'. Useful stuff.