diff --git a/host-agent/Dockerfile.win b/host-agent/Dockerfile.win
index 3566a71..ac07a6f 100644
--- a/host-agent/Dockerfile.win
+++ b/host-agent/Dockerfile.win
@@ -18,7 +18,16 @@ WORKDIR /work
 
 # nssm — Non-Sucking Service Manager (public domain): macht aus der Konsolen-.exe
 # einen sauberen Windows-Dienst (die .exe selbst spricht das SCM nicht).
-RUN curl -fsSL https://nssm.cc/release/nssm-2.24.zip -o /tmp/nssm.zip \
+# nssm.cc faellt oefter aus (503) — dann Ersatz aus dem Internet Archive.
+# Beide liefern dieselbe Datei; die Pruefsumme stellt das sicher.
+ARG NSSM_SHA256=727d1e42275c605e0f04aba98095c38a8e1e46def453cdffce42869428aa6743
+RUN for url in https://nssm.cc/release/nssm-2.24.zip \
+               "https://web.archive.org/web/2024id_/https://nssm.cc/release/nssm-2.24.zip"; do \
+        curl -fsSL --retry 3 --retry-delay 5 --retry-all-errors "$url" -o /tmp/nssm.zip \
+        && echo "$NSSM_SHA256  /tmp/nssm.zip" | sha256sum -c - && break; \
+        echo "nssm: $url fehlgeschlagen, versuche naechste Quelle" >&2; rm -f /tmp/nssm.zip; \
+    done \
+    && test -f /tmp/nssm.zip \
     && unzip -q /tmp/nssm.zip -d /tmp \
     && cp /tmp/nssm-2.24/win64/nssm.exe ./nssm.exe \
     && rm -rf /tmp/nssm*
diff --git a/host-agent/release_agent.sh b/host-agent/release_agent.sh
index cde8fa7..cc5cfcf 100755
--- a/host-agent/release_agent.sh
+++ b/host-agent/release_agent.sh
@@ -117,11 +117,13 @@ if [ "${SKIP_WINDOWS:-0}" = "1" ]; then
     echo -e "  ${YELLOW}Windows-Build uebersprungen (SKIP_WINDOWS=1)${NC}"
 else
     echo -e "  ${CYAN}…${NC} Windows-.exe + setup.exe bauen (Wine, kann dauern)"
-    if ./build-win.sh "$VERSION" >/dev/null 2>&1; then
+    WIN_LOG="$SCRIPT_DIR/dist/build-win.log"
+    if ./build-win.sh "$VERSION" >"$WIN_LOG" 2>&1; then
         echo -e "  ${GREEN}✓${NC} Windows-.exe + setup.exe"
     else
         echo -e "  ${YELLOW}Windows-Build fehlgeschlagen — Release laeuft ohne Windows weiter.${NC}"
-        echo -e "  ${YELLOW}(Einzeln testen: ./build-win.sh $VERSION)${NC}"
+        echo -e "  ${YELLOW}Letzte Zeilen (ganzes Log: $WIN_LOG):${NC}"
+        tail -n 8 "$WIN_LOG" | sed 's/^/    /'
     fi
 fi
 echo ""