Hello guys.

I had the same problem.

my problem occurred when i change start-up parameters for sql server 2008r2 service. i had a mistake when changed that parameters.

Mistake => i forgotten putting ";" (semicolon) between each parameter. i corrected this mistake so problem solved.

this is Correct Start-up Parameters :

-dC:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\DATA\master.mdf;-eC:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\Log\ERRORLOG;-lC:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\DATA\mastlog.ldf