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#11
Its a portable ISO burner. No need to install, just run the application even you are not administrator.
You can't issue the net user command unless you are logged in as an Administrator account or running an Elevated Command Prompt, neither of which he can do.
Get a friend to create the CD/DVD/Flash drive you need. Any Windows computer with a CD/DVD burner can do it.
Do you have access to a Windows install/repair DVD/CD/USB? Boot from that, and use net user :)
Or, use net localgroups to elevate another account to administrative privileges.