1. I think the first thing to check is service ?
Is SQL Server Service running ?
2. If service is running,try to connect to master database ?
3. If service does not start,restore master database from last backup ?
http://msdn.microsoft.com/en-us/library/ms190679.aspx
4. Restart the service in multiuser environment and restore the user databases.
Trending Articles
More Pages to Explore .....