TFS2008: upgrade from TFS 2005 to TFS 2008+SP1 fails with SQL Exception: Lock request time out period exceeded.

While upgrading TFS 2005 to TFS2008 with SP1 slipstreamed (for instruction on Slipstreaming TFS SP1 to TFS 2008 installation media please download the latest TFS 2008 install guide from:http://www.microsoft.com/downloads/details.aspx?familyid=ff12844f-398c-4fe9-8b0d-9e84181d9923&displaylang=en), the upgrade might fail with an error Error 29002.The Team Foundation databases could not be repaired. For more information, see the Microsoft Windows Installer (MSI) log. MSI…

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