Inno Setup's installer doesn't require admin rights after uploading and downloading cycle

Question

I have my Unity game downloading new version of installer from server to AppData/LocalLow/MyProject/Temp and trying to run it. Source executable file really requires UAC to run as admin, as it supposed.

PrivilegesRequired=admin

But when I upload installer to server and download it, an error occurs with a message "Unable to create temp folder. Access denied".

FC says it is complete copy, but one is requesting permission - another does not.

I upload file by converting to byte[] and sending it via POST, download - GET vice versa

It also happens when I try to run this executable by myself. It just doesn't want to ask me for rights.

---

Also, as solution, I tried to force my game to run new process with admin rights:

If I use Mono, I can run installer's process via :

new Process
{
    StartInfo =
    {
         Verb = "runas", 
         FileName = Updater.GetPathToInstaller()
    }
}.Start();

But I need to use IL2CPP, and Unity's IL2CPP doesn't include System.Diagnostics.Process yet, so I'm using this solution to run my installer.

And I don't know how to force it to run with admin.

---

Manifest of the installer:

я╗┐<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
<assemblyIdentity name="JR.Inno.Setup" processorArchitecture="x86" version="1.0.0.0" type="win32"></assemblyIdentity>
<description>Inno Setup</description>
<dependency>
    <dependentAssembly>
        <assemblyIdentity type="win32" name="Microsoft.Windows.Common-Controls" version="6.0.0.0" processorArchitecture="x86" publicKeyToken="6595b64144ccf1df" language="*"></assemblyIdentity>
    </dependentAssembly>
</dependency>
<trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
    <security>
        <requestedPrivileges>
            <requestedExecutionLevel level="asInvoker" uiAccess="false"></requestedExecutionLevel>
        </requestedPrivileges>
    </security>
</trustInfo>
<application xmlns="urn:schemas-microsoft-com:asm.v3">
    <windowsSettings>
        <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">true</dpiAware>
    </windowsSettings>
</application>
<compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
    <application>
        <supportedOS Id="{e2011457-1546-43c5-a5fe-008deee3d3f0}"></supportedOS>
        <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"></supportedOS>
        <supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"></supportedOS>
        <supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}"></supportedOS>
        <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"></supportedOS>
    </application>
</compatibility>
</assembly>

Manifest of "Copy" is identical

Answer 1

So, I figured out that my problem is caused by LOW Integrety Level set to installer after I download it. Why? Because I downloaded it in Application.persistantDataPath which is LocalLow folder. I changed download folder to Application.dataPath which isn't persistent, and in my testing scenario was on the Desktop, and it worked fine - downloaded copy of installer hasn't low MIC

Of course I still need to sign up my installer, as @MartinPrikryl mentioned in the comments, to avoid problems with smart screen, but it isn't the solution for my "It doesn't request the permission, but still needs it" problem