This has been an intermittent problem that's frustrating beyond belief. Sometimes, whether doing a full or incremental backup on Windows Server 2003, the process gets to some random % of completion and then locks up the computer. After reboot, it will repeat the process and usually lock up again. This can go on for two or three days and then for no apparent reason, it starts running it's scheduled backups perfectly. No error is recorded in the Acronis log or System log. Details: Acronis True Image Echo Server, always the latest build Windows Server 2003, Enterprise SP2 Also installed: Exchange Server 2003 SQL Server 2005 ASP.NET 1.0,2.0 Attempted with both VSS enabled/disabled with same results.