Access for multiple domain users to SQL Server using Windows Authentication
For troubleshooting purposes you could fine-tune your deployment after installing SQL Express by attaching this one-liner. Feel free to get more granular with security as needed--perhaps a more exclusive user group besides the local USERS group (and DB_OWNER--hopefully is overkill and can be something much less):

sqlcmd -E -S %COMPUTERNAME%\SQLEXPRESS -Q "CREATE LOGIN [BUILTIN\USERS] FROM WINDOWS; USE &lt;your  database&gt;;CREATE USER [BUILTIN\USERS];EXEC SP_ADDROLEMEMBER DB_OWNER,[BUILTIN\USERS]"


p.s. be sure and change  to the actual database name of the local SQL Express database. And if SQLEXPRESS is not the actual instance name--change that too. There are alternate syntax variants available as you progress up the SQL 20XX versions.