As recommended, I ran the preliminary antispyware, antivirus, etc. and found 9 low risk cookies using Panda (see attachment). I routinely run Windows LiveOneCare which is up to date and run regularly. In addition I do weekly backups to an external HD.
Attached are the logs from HiJackThis and the other screening programs which were run yesterday and today (we have dial up ISP, so things take quite a while to get done!).
Please provide suggestions on what the problem is and how we can get IE back on the same user account in XP as our OE.