Microsoft BizTalk Server 2004 Enterprise Edition

Configuration fails with a "Failed to deploy BizTalk system assembly C:\Program Files\Microsoft\BizTalk Server 2004\Microsoft.BizTalk.DefaultPipelines.dll..."

Cause
This error can occur if the Network Service account does not have write permissions to the temp folder on the computer running BizTalk Server. During configuration, BizTalk Server configuration uses Windows Management Instrumentation (WMI) to deploy .NET assemblies to the BizTalk Management database. WMI impersonates the Network Service account while deploying these assemblies to the BizTalk Management database and so the Network Service account must have write access to the temp folder on the computer running BizTalk Server.

Resolution
Grant the Network Service account write access to the temp folder on the computer running BizTalk Server and run the configuration program again.