Error : Unable to connect the Configuration database in Sharepoint 2010

After restarting the Windows Server.You may get the following Error : Unable to connect the configuration database.
The following steps will fix this problem

1. Goto Run -> Services.msc
2. Restart the  SQL Server(Sql Express) service .
3. Restart the SQL Server(Sharepoint) service
4. Do IISRESET

Thanks,
Suresh