Must have happened sometime Wednesday night. Was able to restore function to IE on Thursday. Ran an online scan at Ewido this morning and it found some other nasties, but as you can see from the HJT log, whataboutadog is still there (even though I put it under restricted sites earlier) . I think I understand from reading the other threads about what to do (replacing the bad bak files with the old ones), but figured I ought to break down and seek assistance so I don't screw something up. GRRRRR!