Microsoft will NEVER email you directly and even if they did, they would never provide links that you would click on to start installing.. As reported by Gizmodo here, it appears the scammers are doing their best to take hold of your computer for what is known as ransomware.. don't fall for it!
Just relax and don't be in a hurry to get Windows 10. Since it will arrive through the normal windows update channel, you will get it sooner or later.
