diff --git a/.github/workflows/build-optimized.yml b/.github/workflows/build-optimized.yml
index 3d1f163..a89c3f3 100644
--- a/.github/workflows/build-optimized.yml
+++ b/.github/workflows/build-optimized.yml
@@ -20,3 +20,18 @@ jobs:
       with:
         name: linux-x64-gui.zip
         path: ./linux-x64.zip
+
+
+  windows:
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Build
+      run: bash ./make-windows.sh
+    - name: Zip to Archive
+      run: 7z a -tzip ./windows-x64.zip ./flips.exe
+    - name: Upload Artifacts
+      uses: actions/upload-artifact@v4.3.1
+      with:
+        name: windows-x64-gui.zip
+        path: ./windows-x64.zip
diff --git a/make-windows.sh b/make-windows.sh
new file mode 100644
index 0000000..6aecfe2
--- /dev/null
+++ b/make-windows.sh
@@ -0,0 +1,32 @@
+#!/bin/sh
+
+# For whatever reason, Windows sometimes has LANG unset. This breaks grep at the end, so setting this manually.
+export LANG=C.UTF-8
+
+echo "This script creates a heavily optimized Windows binary. For debugging you're better off using the Makefile directly."
+
+
+rm floating.zip
+rm -r obj/* || true
+
+#if trying to make a 32bit Flips, add -Wl,--large-address-aware
+
+echo 'Windows (1/3)'
+rm -r obj/* flips.exe; make CFLAGS="$FLAGS -fprofile-generate -lgcov"
+[ -e flips.exe ] || exit
+echo 'Windows (2/3)'
+./flips.exe --create --bps-delta         profile/firefox-10.0esr.tar profile/firefox-17.0esr.tar /dev/null
+./flips.exe --create --bps-delta-moremem profile/firefox-10.0esr.tar profile/firefox-17.0esr.tar /dev/null
+echo 'Windows (3/3)'
+rm flips.exe; make CFLAGS="$FLAGS -fprofile-use -s"
+
+
+# CI currently has invalid dependencies. Unsure if ok or not.
+ERROR_CODE_ON_INVALID_DEPENDENCIES=1
+if [ -z ${IGNORE_ON_INVALID_DEPENDENCIES} ]; then ERROR_CODE_ON_INVALID_DEPENDENCIES=0; fi
+#verify that there are no unexpected dependencies
+objdump -p flips.exe | grep 'DLL Name' | \
+	grep -Pvi '(msvcrt|advapi32|comctl32|comdlg32|gdi32|kernel32|shell32|user32)' && \
+	echo "Invalid dependency" && exit $ERROR_CODE_ON_INVALID_DEPENDENCIES
+
+