Suddenly cannot access SQL Server database
Unknown,FCB::Open failed: Could not open file C:\Program Files (x86)\Microsoft SQL Server\MSSQL10_50.SQLEXPRESS\MSSQL\DATA\PWRCMS.mdf for file number 1.  OS error: 32(The process cannot access the file because it is being used by another process.).


Your database is in use from another process. You need to identify what that process is. Perhaps you attach the DB with AttachDatabase connection string option to a different SQL Server Express instance?