Added extra explanation hyper-v

Author: sanderstad

readme.md

@@ -26,7 +26,7 @@ As with every piece of software we need to set some prerequisites to make this m
 
 * Windows 10 (Professional, Enterprise or Education) or Windows Server 2012 R2 (Standard, Enterprise or Datacenter) and up
 * PowerShell 5 or above
-* Hyper-V
+* Hyper-V Optional Feature (Windows 10) or Hyper-V Feature (Windows Server)
 * SQL Server instance for saving image and clone information (PSDatabaseClone database)
 * SQL Server instance to create the images (can be the same as for saving the information)
 * Enough space to save to save one copy of the database (size of the image is the size of the database)