Update privilege_escalation_windows.md

We now have a low-privileges shell that we want to escalate into a privileged shell.

The process can be automatd with the windows-priv-esc checker.

http://pentestmonkey.net/tools/windows-privesc-check

If you are admin you can use this tool to get SYSTEM.

https://technet.microsoft.com/en-us/sysinternals/bb897553

## Basic Enumeration of the System

Before we start looking for privilege escalation opportunities we need to understand a bit about the machine. We need to know what users have privileges. What patches/hotfixes the system has.