Hii Guys,
                 My sql server service is automatically stopped and throws error while trying to start.
Error From event log : -The log scan number passed to log scan in database 'master' is not valid. This error may indicate data corruption or that the log file (.ldf) does not match the data file (.mdf). If this error occurred during replication, re-create the publication. Otherwise, restore from backup if the problem results in a failure during startup.
I got solution for this issue from this Link.
but after resolution of above issue i got following error in event log.
CB::Open failed: Could not open file e:\sql10_main_t.obj\.x86fre\sql\mkmastr\databases\objfre\ ...

Go to the complete details ...