ctfmon error message

Greetings all,
1 month ago started getting a "ctfmon.exe" error, right before Norton expired.
Updated and for a month, was fine. Suddenly, 3/18/07, started getting them
again.
Looked for and found 4 same "ctfmon.exe" plus 5 with a tag sequence of #'s
and letters attached. Very annoying to say the least. Any and all help would
be very appreciated.
Merci!