@MSLearning: Learn to harden your Windows Enterprise architectures in this Windows 8.1 Security Jump Start Admin / October 16, 2014 Learn to harden your Windows Enterprise architectures in this Windows 8.1 Security Jump Start http://t.co/dN4LUnELD4 pic.twitter.com/DdNXgZeK6A— Microsoft Learn (@MicrosoftLearn) October 16, 2014