After reinstalling WinXP Pro on a workstation, I found this user cannot access a shared database which had not been a problem before. Other users have no problem. I even had the user create a new empty database which, after being closed, could not be reopened at this workstation. Configuration is identical to the other two workstations accessing the database. At this workstation, I get the message "The database you are trying to open is not an ACT! database. To use this database in ACT!, you need to import the data [using the Import Wizard]." This user has admin rights under Act! 2000 and WinXP.