Reinstalling a different SharePoint Instance

I came across a problem of moving backwards on my version of SharePoint (2010->2007).  I uninstalled SharePoint 2010, and then went to install 2007.  Everything worked fine until I got to the psconfig.exe step.  It would fail immediately with a FileNotFound exception.

Turns out that.NET has some assembly redirection magic happening!   You have to run the following commands:

cd c:windowsassemblygac_msil

Edit the config files in the following directories to remove the redirect bindings:

Policy.12.0.Microsoft.SharePoint
Policy.12.0.Microsoft.SharePoint.Portal
Policy.12.0.Microsoft.SharePoint.Publishing
Policy.12.0.Microsoft.SharePoint.Security
Policy.12.0.Microsoft.SharePoint.WorkflowActions
Policy.12.0.Microsoft.SharePoint.Workflows

cd c:windowsassemblyGAC_64

Policy.12.0.Microsoft.SharePoint.Search
Policy.12.0.Microsoft.Office.Server.Search
Policy.12.0.Microsoft.Office.Workflow.Feature

Chris

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