ERROR: Operation cancelled by user. Failed to load resource DLL when running setupdl.exe in Configuration Manager
Now, if you think you could cheat by simply just copying the setupdl.exe file to a writable drive you would be able to download ConfigMgr client prerequisite, think again. You would need the other files which is located in the same directory in order to get this running. So the easiest way to get this done is to copy the entire X64 folder to a writable drive and then try running setupdl.exe again. Good luck!