When starting sheduled task on a windows 2003 SBS server, backuping data and exchange, 3 a 4 minutes after the backup has started the server hangs, In the event log application section1030 and 1058 messages are displayed. in the event system log event ID 2020 is logged . What schould be wrong. The problem doesn't occur when scheduled task in NTbackup are disabled, So i'm pretty sure that the problem is triggered by NTbackup. There are no removables devices in you Proliant server, we are backing up to a NAS (Thecus).