Windows

You could put it into the Start Up folder. But that will require you to logon, and as I understand you want it to run before you logon.
In the resource kit there is a tool called servany.exe that will let you run any program as a service. This toolwas created just for this purpose according to MS.

Can you please elaborate your problem? Is it that you want that program to start automatically at login or u dont want the Login Screen?

I use FireDaemon v0.09c which allows you to run regular applications as a service ...
or use the instructiuons here:
http://www.ss64.demon.co.uk/ntsyntax/autoexec.html

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