Recommend adding Godot folder to AV exceptions in Compiling for Windows (#4736)

development/compiling/compiling_for_windows.rst

@@ -88,6 +88,18 @@ Downloading it (cloning) using `Git <https://git-scm.com/>`_ is recommended.
 The tutorial will assume from now on that you placed the source code in
 ``C:\godot``.
 
+.. warning::
+
+    To prevent slowdowns caused by continuous virus scanning during compilation,
+    add the Godot source folder to the list of exceptions in your antivirus
+    software.
+
+    For Windows Defender, hit the :kbd:`Windows` key, type
+    "Windows Defender Settings" then hit :kbd:`Enter`.
+    Under **Virus & threat protection**, go to **Virus & threat protection setting**
+    and scroll down to **Exclusions**. Click **Add or remove exclusions** then
+    add the Godot source folder.
+
 Compiling
 ---------