I'm a first-time user of Windows ISO Downloader

When I double-click the downloaded Windows ISO Downloader.exe (v5.26) I always get the error "Access denied! Access is denied." (even with Antivirus / Firewall disabled) and terminates

What might be going on ?

 

That's an issue I've not encountered before... Have you tried running the downloader as administrator?

If that doesn't help, would you mind posting a screenshot of the error?

In the meanwhile I found out that the error isn't given by Windows ISO Downloader.

I was launching Windows ISO Downloader  within TotalCommander which resulted in the "Access denied! Access is denied."  error message

When I launch Windows ISO Downloader  within WindowsExplorer I get the error message "Windows ISO Downloader.exe is not a valid Win32 application."

So actually, it seems Windows ISO Downloader never gets control

 

The tool doesn't run on Windows XP. You need Windows 7, 8.x or 10.