If you have Project Server 2007 installed on a farm on top of Office SharePoint Server 2007 then if you uninstall Project Server the final screen will remind you to run the SharePoint Products and Technologies Configuration Wizard (PSconfig – where PS stands for post setup, not Project Server).  Failure to run the wizard will leave you in a state where SharePoint will not work and if you look in InetMgr you may be shocked to see all your web sites gone!  Don’t panic – just run the wizard and all will be well.  Well almost all.  If you have set host headers on sites I understand you may need to re-set these as the uninstall un-sets these.  We are investigating a better way to ensure a more reliable uninstall experience.

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