An odd thing about Vista+ O/S's is that, once you run a process in elevated privileges mode, you can't run other processes in lower-privileged modes.

Why, you ask, would that be important?

Sometimes you want - or need - to limit the privileges of a process:
  • A very common scenario for me is drag-and-drop.
    Windows' Explorer does NOT allow this to occur between lower privileged processes (like Explorer itself!) and other processes.  This is very frustrating for users in programs that take advantage of that.
  • There's also some problems using certain SendMessage commands from other unelevated processes.
  • Setting the state or properties of windows that have an elevated privilege may not work either from other unelevated processes.
  • An install or setup program that needs to launch the installed program will more often than not want to run that program on a lower privilege level (for some of the reasons mentioned above)
So, after some looking around I found a way of running processes under a lower privilege mode.
Check Elmue's comment 'Here the cleaned and bugfixed code' on this CodeProject page to see where my code was ported from:

The usage is straightforward for this one: use it like Run/RunWait, but with the command-line as the 2nd parameter. [i.e. _RunWithReducedPrivileges(@ComSpec,' /k title Non-Admin prompt') ]

Anyway, hope this helps someone out!

Ascend4nt's AutoIT Code License agreement:
While I provide this source code freely, if you do use the code in your projects, all I ask is that:
  1. If you provide source, keep the header as I have put it, OR, if you expand it, then at least acknowledge me as the original author, and any other authors I credit
  2. If the program is released, acknowledge me in your credits (it doesn't have to state which functions came from me, though  again if the source is provided - see #1)
  3. The source on it's own (as opposed to part of a project) can not be posted unless a link to the page(s) where the code were retrieved from is provided and a message stating that the latest updates will be available on the page(s) linked to.
  4. Pieces of the code can however be discussed on the threads where Ascend4nt has posted the code without worrying about further linking.

A Scendant,
Nov 30, 2010, 7:35 PM