Are you running Fox Pro? http://support.microsoft.com/kb/q240982/
Go to this link, there are patches for this. Have had others with the same problem. Go down to the bottom for the NT section.
Hope this helps....Paul
I am rnning an Ultimate Family Tree Version 2.7 and my new Windows XP give a "divide by Zero or Overflow error", that is driving me crazy, can anyone help?