Updated setup_windows.md.

Jolt Physics disabling vector instructions, some other cleanup.

Author: afritz1

docs/setup_windows.md

@@ -1,16 +1,13 @@
-# OpenTESArena build manual for Visual Studio
+## Building OpenTESArena with Visual Studio + vcpkg
 
-This document describes how to setup a build environment for building with Visual Studio.
-
-## Setup build environment
-
-1. Install [Visual Studio Community 2019](https://www.visualstudio.com/downloads/) with the C++ for games workload
+### Setting up build environment
+1. Install the latest [Visual Studio Community](https://www.visualstudio.com/downloads/) with the C++ for Games workload
 2. Install [cmake](https://cmake.org/download/) and [git](https://git-scm.com/download)
 
-### Installing vcpkg
-The easiest way to build the dependencies is with [vcpkg](https://github.com/Microsoft/vcpkg)
+#### Installing vcpkg
+The easiest way to build the dependencies is with [vcpkg](https://github.com/Microsoft/vcpkg).
 
-1. Clone [vcpkg](https://github.com/Microsoft/vcpkg) to ```C:/Tools/vcpkg/```:
+1. Clone [vcpkg](https://github.com/Microsoft/vcpkg) to `C:/Tools/vcpkg/`:
   ```PowerShell
   cd C:\Tools\vcpkg\
   git clone https://github.com/Microsoft/vcpkg.git .
@@ -25,15 +22,20 @@ The easiest way to build the dependencies is with [vcpkg](https://github.com/Mic
   .\vcpkg install sdl2 openal-soft wildmidi --triplet x64-windows
   ```
 
-## Building
-
-1. Create a `build` directory and move into it
-2. Create solution files with `cmake`:
-
+### Building
+1. Create a `build` directory and navigate into it
+2. Create .sln solution files with `cmake`:
   ```PowerShell
   cmake -DCMAKE_TOOLCHAIN_FILE=C:/Tools/vcpkg/scripts/buildsystems/vcpkg.cmake ..
   ```
-3. Open the file OpenTESArena.sln and in Visual Studio, do the following from the menu: Build -> build Solution
-
-4.   The compilation is done when you can read something like the following in the bottom text output window:  
-  ```========== Build: succeeded ==========```
+  - **Warning**: Jolt Physics enables CPU features which may cause illegal instruction errors. You can set these `OFF` in CMake ([more information](https://github.com/jrouwe/JoltPhysics/blob/20eedf47c4bf064e740c9de2f638a8c1d57ce2ed/Build/README.md#illegal-instruction-error))
+    ```bash
+    -DUSE_SSE4_1=OFF -DUSE_SSE4_2=OFF -DUSE_AVX=OFF -DUSE_AVX2=OFF -DUSE_AVX512=OFF -DUSE_LZCNT=OFF -DUSE_TZCNT=OFF -DUSE_F16C=OFF -DUSE_FMADD=OFF
+    ```
+3. Open the file OpenTESArena.sln in Visual Studio
+4. Make sure `otesa` in the solution hierarchy is set as the startup project
+5. Select Build -> Build Solution
+6. Compilation is done when you can read something like the following in the bottom text output window:
+  ```
+  ========== Build: succeeded ==========
+  ```