Had the same problem, I fixed it.

In the SQL Server Configuration manager, I clicked on the SQL Server Services (on the left). There I right clicked on the SQL Server Instance that I wanted to start, clicked on properties clicked the Built-in account radio button , selected Local system from the dropdown menu, after that, I started the SQL Server instance and worked fine for me.

This really Works .. i had verified lot of sites and finally got the answer

This may occurs when the master.mdf or the mastlog.ldf gets corrupt . In order to solve the issue goto the following path

C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL , there you will find a folder ” Template Data ” , copy the master.mdf and mastlog.ldf and replace it in

C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\DATA folder .

Thats it . Now start the MS SQL service and you are done .

It was very tedious when I get same problem. When I got this problem, I uninstall my SQL Server 2008 but after installing the SQL Server 2008 again,I got the same problem. I was so tensed plus, I had not gotten any help from any site.

To over come this problem. Simply You Need to go on SQL Server Configuration Manager and then click On Protocols on left panel. If you running Network service just disable "VIA" Protocol. And after that try to start your SQL service it will run successfully.

If you are running SQL Server in a local environment and not over a TCP/IP connection. Go to Protocols under SQL Server Configuration Manager, Properties, and disable TCP/IP. Once this is done then the error message will go away when restarting the service.

Just disable the VIA protocol in sql server configuration manager

I think this solution is more appropriate, because it does not prevent you from using TCP/IP access.

To open a port in the Windows firewall for TCP access

On the Start menu, click Run, type WF.msc, and then click OK.

In the Windows Firewall with Advanced Security, in the left pane, right-click Inbound Rules, and then click New Rule in the action pane.

In the Rule Type dialog box, select Port, and then click Next.

In the Protocol and Ports dialog box, select TCP. Select Specific local ports, and then type the port number of the instance of the Database Engine, such as 1433 for the default instance. Click Next.

In the Action dialog box, select Allow the connection, and then click Next.

In the Profile dialog box, select any profiles that describe the computer connection environment when you want to connect to the Database Engine, and then click Next.

In the Name dialog box, type a name and description for this rule, and then click Finish.

 

Source

Stackoverflow.com