When trying to shrink huge log files, because of the missing backup of transaction log and corresponding option to truncate log. So first backup your databases and replace your_database with one you want to.
USE Your_Database
GO
DBCC SHRINKFILE(Your_Database_log, 10)
GO
BACKUP LOG Your_Database WITH TRUNCATE_ONLY
GO
DBCC SHRINKFILE(Your_Database_log, 10)
GO
Apply to MSSQL Server 2005
