SBS2011 error messages after installing Sharepoint 2010 updates

You may get various error messages after installing Sharepoint 2010 updates (such as SP1). This is due to the requirement of upgrading the Sharepoint database after installing updates.

To check this issue, open an elevated Sharepoint 2010 Management Shell and run the following:

(get-spserver $env:computername).NeedsUpgrade

If the the output says True, then you need to upgrade the Sharepoint database. To do that, open an elevated Command Prompt and run the following:

cd \"Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\BIN"
PSConfig.exe -cmd upgrade -inplace b2b -force -cmd applicationcontent -install -cmd installfeatures

It should take about 5-10 minutes depending on hardware and the size of the database. It should say successfully upgraded database. I recommend rebooting the server afterwards just to be sure.

For more info: http://blogs.technet.com/b/sbs/archive/2011/07/06/potential-issues-after-installing-sharepoint-foundation-2010-sp1.aspx