Loader for .exe file with authorization

I need a loader that will download .exe file from web and then run it. I want the Loader to support a large number of users, with the exception that 1 user - 1 device, preferably authorization should be done by classic login:pass and HWID It is also important that the Loader does not leave an .exe file anywhere for the user to copy (running from memory?) I also don't have any hosting from which the program could check authorization and download the file, you will need to program such functions and I will gladly take advice on which hosting to use. It will be good if the loader has any graphical interface where the user can enter his login and password and run the file