Note on Hyper-V & VT-x

Updated note on VT-x, to include information on Hyper-V and it's interference with VT-x on windows-platform systems. https://social.technet.microsoft.com/Forums/windows/en-US/118561b9-7155-46e3-a874-6a38b35c67fd/hyperv-disables-vtx-for-other-hypervisors?forum=w8itprogeneral

Author: Lewiscowles1986

homestead.md

@@ -24,7 +24,7 @@ Laravel Homestead is an official, pre-packaged Vagrant box that provides you a w
 
 Homestead runs on any Windows, Mac, or Linux system, and includes the Nginx web server, PHP 7.0, MySQL, Postgres, Redis, Memcached, Node, and all of the other goodies you need to develop amazing Laravel applications.
 
-> **Note:** If you are using Windows, you may need to enable hardware virtualization (VT-x). It can usually be enabled via your BIOS.
+> **Note:** If you are using Windows, you may need to enable hardware virtualization (VT-x). It can usually be enabled via your BIOS. If you are using Hyper-V on a UEFI system you may additionally need to disable Hyper-V in order to access VT-x.
 
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 ### Included Software