Execute postinstall program with administrator privileges in Inno Setup

Question

I'm trying to run another installer at the end of the installation ( postinstall ). The installer needs administrator provileges. So PrivilegesRequired=admin was added and the error still was there.

Error message below:

Unable to execute file:
C:\\Users\\User1\\AppData\\Local\\Multi Webcam Video Recorder\\webcam.exe

CreateProcess failed; code 740.
The requested operation requires elevation.

#define MyAppName "Multi Webcam Video Recorder"
#define MyAppExeName "webcam.exe"

[Setup]
AppName={#MyAppName}
PrivilegesRequired=admin

[Files]
Source: ..\src\webcam.exe; DestDir: {localappdata}\{#MyAppName}; Flags: ignoreversion

[Run]
Filename: {localappdata}\{#MyAppName}\{#MyAppExeName}; Description: {cm:LaunchProgram,{#MyAppName}}; Flags: nowait postinstall skipifsilent

Answer 1

With postinstall flag , the program is by default executed with original permissions, even if the installer itself is running with Administrator permissions. To keep the (Administrator) permissions of the installer, add runascurrentuser flag :

[Run]
Filename: {localappdata}\{#MyAppName}\{#MyAppExeName}; \
    Description: {cm:LaunchProgram,{#MyAppName}}; \
    Flags: nowait postinstall skipifsilent runascurrentuser