Post Windows SharePoint Services Service Pack3 installation, you may
Encounter error messages:
Exception from HRESULT: 0x80040E14.
Troubleshoot issues with Windows SharePoint Services.
HTTP 500 – Internal server error
Unable to perform the following operations:
Edit columns on a list
Import a spreadsheet
Add choices to a choice field
To resolve this, run the following command for
Windows SharePoint Services 2.0
1.Click Start, click Run, type cmd in the Open box, and then click OK.
2.At the command prompt, type the following lines, and then press ENTER after each line:
cd /d %commonprogramfiles%\Microsoft Shared\Web Server Extensions\60\Bin
stsadm -o upgrade -forceupgrade
3.Type exit to exit Command Prompt.
Windows SharePoint Services 3.0
1.Click Start, click Run, type cmd in the Open box, and then click OK.
2.At the command prompt, type the following lines, and then press ENTER after each line:
cd /d %commonprogramfiles%\Microsoft Shared\web server extensions\12\BIN
stsadm -o upgrade -forceupgrade
3.Type exit to exit Command Prompt.
Sourced from Microsoft KB 841216