No need to reinstall or upgrade an instance of SQL Server 2008 R2. I got the same error, and it can be solved by simply starting the standard MSSQLSERVER service.
How to start this service:
Go to Administrative Tasks> Services> Select the Standard Services tab> start the SQL Server Agent service (MSSQLSERVER) and you're good to go.
Harmeet Singh Bhamra Jun 16 '14 at 4:28 2014-06-16 04:28
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