Add note for Windows (#1)

README.md

@@ -50,6 +50,19 @@ fn main(){
 }
 ```
 
+## Note for Windows users
+To build [libpnet](https://github.com/libpnet/libpnet) on Windows, follow the instructions below.
+> ### Windows
+> * You must use a version of Rust which uses the MSVC toolchain
+> * You must have [WinPcap](https://www.winpcap.org/) or [npcap](https://nmap.org/npcap/) installed
+>   (tested with version WinPcap 4.1.3) (If using npcap, make sure to install with the "Install Npcap in WinPcap API-compatible Mode")
+> * You must place `Packet.lib` from the [WinPcap Developers pack](https://www.winpcap.org/devel.htm)
+>   in a directory named `lib`, in the root of this repository. Alternatively, you can use any of the
+>   locations listed in the `%LIB%`/`$Env:LIB` environment variables. For the 64 bit toolchain it is
+>   in `WpdPack/Lib/x64/Packet.lib`, for the 32 bit toolchain, it is in `WpdPack/Lib/Packet.lib`.
+
+[Source](https://github.com/libpnet/libpnet/blob/master/README.md#windows "libpnet#windows")
+
 ## Tested on
 - Linux
     - Kali 2021.1 (VMware)