Using RC1 ESS on XP x64 SP2. I don't use my administrator account all the time, so I set up ESS to email my limited account. Several times I've gotten an E titled %s ERROR, I just got this: "10/11/2007 22:22:35 PM - During execution of on the computer unknown, the following warning occurred: Antispam: Error starting antispam engine." When I first installed RC1 I got an XP popup error message each time Outlook 2003 SP3 was opened in a limited account. It did not do this in the administrator's account. So I uninstalled, manually deleted the stuff from prefetch and registry, set all accounts to administrator, reinstalled, opened Outlook in each account, then returned the accounts to normal privileges. That stopped the popup windows error. Now I get these %s ERROR E's sent out by ESS every time a limited user opens Outlook. At least ESS seems to be running smoothly now with this release, found one other issue I'll start a new thread for that.