Common failures that SQL Server cannot start

Server

Common failures that SQL Server cannot start

--Did you modify the operating system password?

--Modifying the operating system password, which causes SQL to not start the workaround:

1.
My Computer--control Panel--management tools--services--right key mssqlserver--properties--landing--Landing identity--Select "Local System Account"

Or:
2.
My Computer--control Panel--management tools--services--right key mssqlserver--properties--landing--Landing identity--select "This Account"--Password and Confirm password to enter your modified administrator password.

The difference between the two:
Choose the first way, later modified the administrator password, no more adjustments (but require the system administrator to log on to the operating system)

Select the second way, later modified the administrator password, but also repeat the above operation.

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2. Did you modify the computer name?
If you modify the computer name, put the SQL installation CD, perform the installation program to repair (the repair process is done automatically, follow the prompts to do, do not destroy the data, and soon)

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3. Check the evaluation version of your installation? If so, it may have expired, install a formal version of it.
The check method is to install SQL SP3, if the evaluation version, there will be error prompts, can not install