Hi Nicolas, It is now twice that Chaoscope crashed. The sequence of events are F3, F4 then Error message apears as attached with the rendered window being grey when pressing [OK] a new small message window pops up every second or so [blue title bar] = chaoscope [message text] Ctrl-C hit (or something like that) and a [OK] button Clicking the button - chaosscop closes down, all mesaage windows close down Chaoscope version 0.2.0 Operating system Windows 2000 - Hyperthreading Disabled best regards Anton ___________________________________________________________ALL-NEW Yahoo! Messenger - all new features - even more fun! http://uk.messenger.yahoo.com