Sharepoint 2010–Orden correcto de instalación

1. SharePoint 2010 RTM + SP1 (slipstreamed)
2. Configure Farm using PowerShell
3. Office Web Apps RTM + SP1 (slipstreamed)
4. Run SharePoint Config Wizard (PSConfig) on all severs
5. SharePoint 2010 Server Language Pack RTM + SP1 (slipstreamed)
6. Run SharePoint Config Wizard (PSConfig) on all servers
7. Install OCT 2011 CU (or current recommended CU)
8. Run SharePoint Config Wizard (PSConfig) on all servers

Additional Note: Sometimes after installing CU’s I’ve noticed errors when trying to run the SharePoint Products Configuration Wizard (PSConfig), like in the screenshot below. In my case the PSConfig wizard was complaining about missing language packs and the CU files, which I could confirm had been installed properly and there before installing the CU. To fix this, I simply forced PSConfig through PowerShell – avoiding the GUI – and it worked like a charm!

psconfig.exe -cmd installcheck -noinstallcheck

There's also IISRESET and rebooting your servers as potential fixes too.

Fuente:

http://sharepoint.jsturges.com/2012/02/correct-installation-order-for-sharepoint-server-2010-farms/

Más información sobre el error:

http://social.technet.microsoft.com/Forums/en/sharepoint2010setup/thread/e4cd8263-26b3-4259-afdf-620acb23dfde