My Norton Antivirus detected two infections:
1) Trojan.Initbar and 2) Trojan.Malscript!html.

I believe Norton successfully removed # 2 but not #1.

I then rebooted in SAFE MODE but I can't even log in to any of the 5 user accounts on the system, not even ADMINSTRATOR. I can get to the login screen but when I try to login to any account, the login process starts and 1 to 2 seconds later I get a message "saving settings" and am automatically logged off.

Is there any sort of utility I could load on a USB stick and load onto the infected computer to detect and delete the infections?

I'm trying to avoid a full reformat/reinstall of Windows XP.

Thanks for any help.