Determine If The User Launching Installer Is In The Administrators Group

Title

Summary

How to use custom actions to check for the User in Admin group

Synopsis

This approach involves the use of InstallScript Language method Is() to retrieve information regarding the current user being in the Administrators group. USER_INADMINGROUP is a predefined constant identifier reserved by InstallScript to represent a specific literal value.

USER_INADMINGORUP returns TRUE from Is() regardless of whether the SE_GROUP_USE_FOR_DENY_ONLY SID attribute is set for the group (that is, regardless of whether the user with administrative privileges is running the installation with a standard access token).

Discussion

This approach uses more than one custom action and the actions are expected to be scheduled very early in the sequence in the running Basic MSI installer.

Custom Action 1:

function CheckAdmin(hMSI) 
begin 
    if( Is(USER_INADMINGROUP, "")) then 
        MsiSetProperty(hMSI, "ADMINLOGIN", "1"); 
    else 
        MsiSetProperty(hMSI, "ADMINLOGIN", "0"); 
    endif; 
end;

Custom Action 2:

Type 19 "New Error" custom action to display a specified error message, returns failure, and ends the installation. 
Set the install condition: ADMINLOGIN=0

Steps:

Schedule CheckAdmin(hMSI) after AppSearch in both Install UI sequence and Execute sequence
Schedule the second action after CheckAdmin

Related Documents

Is function

Custom Action Wizard - Action Type Panel

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Case id: 00001065