diff --git a/uvloop/loop.pyx b/uvloop/loop.pyx
index 04f30af..d4a95fd 100644
--- a/uvloop/loop.pyx
+++ b/uvloop/loop.pyx
@@ -2743,6 +2743,10 @@ cdef void __atfork_child() nogil:
 
 cdef __install_atfork():
     global __atfork_installed
+
+    IF UNAME_SYSNAME == "Windows":
+        return
+
     if __atfork_installed:
         return
     __atfork_installed = 1