If you are into computer security and not a security expert, this is a great talk by Mikko Hypponen. He is a security researcher from F-Secure.
Some of the highlights from the talk includes a floppy disk containing the first known computer virus from Pakistan; Y2K and Y38K (“Try to set the date to year 2038 on your smart phone; you can’t”); introduction to Stuxnet and it's implications; implication to network security as the world become more connected with IoT devices.
One of the comment worthy remembering was (paraphrasing): when he started his career, he didn't know he would be fighting against state actors, and/or gun-carrying organized criminals who would literally jump over the window to flee.
He also highly recommends the movie Zero Day, a documentary about Stuxnet.