Thank you VoG. Toolbar Cop done the trick and I found the offending BHO. I.E. now working again. Sorry for the delay in replying but I have rather more problems than I.E. Finally cured them by restoring my last back up when all else failed. To be honest, I, along witg a lot of other people no doubt, never used to bother with back ups, thought it was a waste of time and Hard Drive space. After what I've been through these last few days, no more, I'm only glad I started doing it, it has saved me doing what was beginning to look like a reformat job. Thanks again for your help.