NB not starting

[John Spencer <spencer () jcu ! edu>]

I recently upgraded the security on my "windows" XP and now NB  will not 
start (I have NB 7.0b, lingua workstation)

I click on the icon (or go to the .exe in the file) and the machine 
"whirls" but nothing happens -- no error message; no NBr anything.

Any suggestions.

John Spencer