I got backdoor agent on my win2k box. It sucked to try and remove. I finally had to boot in windows recovery console and use a command line to delete the offending file (kbde.dll IIRC). Even booting from another win2k disk would not allow me to delete the file, only the recovery console would allow me to delete. Even in RC, I had to change the perm on the file.
"When fascism comes to America, it will be wrapped in the flag and carrying the cross." - Unknown
"Government is not reason, it is not eloquence, it is force" - George Washington