diff --git a/checkin_notes b/checkin_notes
index d42c1bf1ef..3a006e2a7f 100755
--- a/checkin_notes
+++ b/checkin_notes
@@ -2315,3 +2315,7 @@ Rom    23 Feb 2006
     lib/
         gui_rpc_client.h
         gui_rpc_client_ops.C
+
+Rom    24 Feb 2006 (HEAD)
+    - Tag for 5.3.21 release, all platforms
+      boinc_core_release_5_3_21
diff --git a/win_build/installerv2/BOINC.ism b/win_build/installerv2/BOINC.ism
index 8346031eca..0494c47ae6 100644
Binary files a/win_build/installerv2/BOINC.ism and b/win_build/installerv2/BOINC.ism differ