If your server has remote desktop on a public IP, protect it from brute force attacks by installing the 100% free RDP Shield.
Features include the ability to set the number of failed logins within a given time. Set the amount of time you would like to block the attacker.
RDP Shield runs as a service and protects your server 24/7.
With a large rise in hacking attempts via RDP particularly in 2014, and no built-in Windows product to offer this level of protection, RDP Shield is a necessity.
Every Windows server or computer with remote desktop should have this freeware program installed.