SQL Server 2008 R2 not connect to server - sql-server-2008-r2

I have installed the SQL server 2008 R2 on windows 7, when i want to connect database engine it give the following error message
TITLE: Connect to Server
Cannot connect to (local).
ADDITIONAL INFORMATION:
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=2&LinkId=20476
I tried both window and SQL Server authentication but no success.
please help.

First Check whether any SQL Server Instance is running and exists.
You can check list of instances as per below:
Go to command prompt and type in “osql -L” or “sqlcmd -L”.
If instance is showing in list then check your credentials.

Start the sqlserver service. Nothing to do in stackoverflow. Move question to serverfault.

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Can't connect to SQL Azure from EF, but can from SSMS

We have an Azure SQL server running which we use for our Azure Web App. The Web App can connect without a problem. We're trying to remotely update the database with the latest EF migrations via a C# console application.
However we get the following exception.
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
We tried connecting from the same PC with SSMS and we got in without any problems. And yes, before anyone asks we whitelisted the IP in Azure, else we wouldn't even had access via SSMS. We also tried with and without "tcp:" in the connectionstring.
This is the connectionstring we use in the Web and Console Application:
Server=tcp:{servername}.database.windows.net;Database={dbname};user id = {userid};password = {password};MultipleActiveResultSets=True;
In SSMS we just use {servername}.database.windows.net and use the credentials.
Thanks in advance.
We haven't been able to solve this issue. We instead chose to go with ReadyRoll, which suits us fine.
Azure SQL requires secured connection. You have to add the following to your connection string:
Trusted_Connection=False;Encrypt=True;

SQL Server 2008 R2 ODBC Error: SQL state HTY00

My application server (say 192.168.100.1) and database server (say 192.168.100.2) both are on the same domain. I'm trying to create an ODBC connection from the application server to a SQL Server database on the database server, but at the time of login it generates this error:
Microsoft SQL Server Login
Connection failed:
SQL State: 'HYT00'
SQL Sever Error: 0
[Microsoft][ODBC SQL Server Driver]Login timeout expired
I've checked all configuration for SQL Server and tried possible solutions without resolving this issue.
Important:
A DSN can be successfully created from my own PC but when attempting this server to server as described above, ODBC is facing this problem.
OK, I have got the solution. Sometimes, if SQL Server can't be found on network by its name while creating DSN in windows, the logging in takes time more than usual which tells ODBC manager that Database Server we are looking for is not responding or responding too late.
Solution.
Instead of selecting server from the list while making dsn, use 'server-ip\SQLExpress'.
e.g 192.168.100.2\SQLExpress.
Thats All.

Can't connect to SQL Server 2008 R2 Management Studio

I have an instance of SQL Server 2008 R2 on my local machine, and today, when I try to connect via Management Studio (as I used to do with no errors, using Windows Authentication), I get the following error:
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2)
Any sugestions?

Crystal Reports in C#

Actually i try to make the crystal report of my database table values, so far i reached the primary stage of SQL connection. whenever i choose the new connection it seems to produce some errors like,
A network-related or instance0specific error occured while establishing a connection to SQL Server. The serve was not found or was not accessive. Verify that the instance name is correct and that SQL Server is configured to all allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
can anyone pls guide me to generate the crystal report.
Thank you,
Arunkumar M
From the error message you seem want to connect over Named Pipes. Check in SQL Server Configuration Manager if you have enabled Named Pipes
Also you can use PortQueryUI [http://www.microsoft.com/en-us/download/details.aspx?id=24009] to see if your SQL Server is from your location accesible and if it listens on Named Pipes.
Alternatively you could try to connect over TCP/IP port 1433. Also check in SQL COnfiguration Manager if you have TCP/IP enabled and check in PortQueryUI if SQL Servers TCP ports are open.

How to connect to a remote SQL Server 2008 R2 instance using SSMS?

I want to connect to a remote SQL Server 2008 R2 instance installed on a remote Windows Web Server 2008, using SQL Server Management Studio Express. Can someone provide me all the necessary steps? I read some answers here, but nothing seems to work. I'm confused as to where (locally or remotely) to enable the SQL Browser, set TCP/IP ON, specify port 1499 etc.
enable SQLBrowser
open 1433 default port (in your case it may be different but 1433 is default)
enable SQL Server authentication for your instance
restart your SQL Server instance
Make sure your domain (sql server instance) is publicly/remotely accessible
From SSMS enter your SQL Server instance url/IP address
enter your credentials
this should be all.