OK - I did not read the XMON install first - doh! I installed NOD32 and then installed Exhange version not knowing that it wasn't a seperate module. So now the information store mounts - then a couple of minutes later the information store stops. I have uninstalled everything. I have deleted every 'eset' entry from the registry and deleted the ESET folder. I have now installed correctly (several times) however this behaviour still exists. When I stop XMON the information store is stable - when i start it again it stops anywhere between a few seconds and a few minutes later. Any ideas? Am I missing something when I am uninstalling NOD32?