How can I execute commands with a different user than SYSTEM on Windows®?

You need an external way to execute commands using privileges from another user. Windows command RunAS will allow that, but you’ll need to input the password for that user “interactively”, so this not useful for automating anything. Therefore, you’ll need to use another tool able to execute something passing as user and password parameters in the command line. CPAU, a freeware tool, does exactly that. You can get it from here:

http://www.joeware.net/freetools/tools/cpau/index.htm

Basic use:

CPAU -u user [-p password] -ex "WhatToRun" [switches]

user User to log on as. Ex: user or domain\user
password User's password
WhatToRun What to execute

There’s another tool with more options to encrypt the password, and with more security options, for avoid putting a password on the .conf file an it let more cipher options. This tool is called RunAsSSPC, and you can get it from here:

http://robotronic.de/runasspcEn.html