Anda mungkin pernah mendapatkan error seperti ini ketika membuka Site sharepoint di lokal.

Penyebab munculnya adalah karena database (SQL Server) yang digunakan oleh sharepoint belum running. Atau karena masalah lainnya (source: Microsoft Support):
- Internet Information Services (IIS) is configured to run in IIS 5.0 isolation mode.
- The account that is used by application pool does not have the required permissions to the SQL Server database.
- Network connectivity has been lost between the Windows SharePoint Services server and the Microsoft SQL Server server.
Solusi:
- Start > Program > Administrative Tools > Services
- Cari SQL Server (Sharepoint) pastikan sudah running