diff --git a/Makefile b/Makefile
index 0854b02..7f62030 100644
--- a/Makefile
+++ b/Makefile
@@ -11,6 +11,9 @@ PROFILE_VERSION=$(MAJOR).$(MINOR).$(BUILD)
 
 all: version prep install.exe
 
+fmt:
+	find . -name '*.java' -exec clang-format -i {} \;
+
 tag:
 	git tag $(PROFILE_VERSION)
 
diff --git a/java/net/i2p/router/CopyConfigDir.java b/java/net/i2p/router/CopyConfigDir.java
index 66333e6..c7a6c5c 100644
--- a/java/net/i2p/router/CopyConfigDir.java
+++ b/java/net/i2p/router/CopyConfigDir.java
@@ -66,18 +66,21 @@ public class CopyConfigDir extends WindowsServiceUtil {
         if (0 == cnr)
           return false;
         if (1 == cnr) {
-          logger.info("using jpackaged configs in a jpackaged install, creating jpackaged file");
+          logger.info(
+              "using jpackaged configs in a jpackaged install, creating jpackaged file");
           File jpackagedConfigsInUse = new File(appImageHome(), "jpackaged");
-          if (!jpackagedConfigsInUse.exists()){
-            try{
+          if (!jpackagedConfigsInUse.exists()) {
+            try {
               jpackagedConfigsInUse.createNewFile();
-            }catch(IOException e){
-              logger.warning("Error creating jpackaged file, delete config files manually when uninstalling");
+            } catch (IOException e) {
+              logger.warning(
+                  "Error creating jpackaged file, delete config files manually when uninstalling");
             }
           }
         }
         if (-1 == cnr) {
-          logger.info("not overwriting existing config file, not creating jpackaged file");
+          logger.info(
+              "not overwriting existing config file, not creating jpackaged file");
         }
       }
     }
diff --git a/java/net/i2p/router/WinLauncher.java b/java/net/i2p/router/WinLauncher.java
index 4587d50..6ce22f2 100644
--- a/java/net/i2p/router/WinLauncher.java
+++ b/java/net/i2p/router/WinLauncher.java
@@ -172,7 +172,8 @@ public class WinLauncher extends CopyConfigDir {
       i2pRouter = new Router(routerconf, System.getProperties());
       String newsURL = i2pRouter.getConfigSetting("router.newsURL");
       if (newsURL != null) {
-        if (newsURL.contains("http://dn3tvalnjz432qkqsvpfdqrwpqkw3ye4n4i2uyfr4jexvo3sp5ka.b32.i2p/news/win/beta/news.su3")) {
+        if (newsURL.contains(
+                "http://dn3tvalnjz432qkqsvpfdqrwpqkw3ye4n4i2uyfr4jexvo3sp5ka.b32.i2p/news/win/beta/news.su3")) {
           logger.info(
               "checked router.newsURL config, containes win/beta in a service install, invalid update type");
           if (i2pRouter.saveConfig("router.newsURL", ServiceUpdaterString())) {
@@ -183,7 +184,8 @@ public class WinLauncher extends CopyConfigDir {
       }
       String backupNewsURL = i2pRouter.getConfigSetting("router.backupNewsURL");
       if (backupNewsURL != null) {
-        if (backupNewsURL.contains("http://tc73n4kivdroccekirco7rhgxdg5f3cjvbaapabupeyzrqwv5guq.b32.i2p/win/beta/news.su3")) {
+        if (backupNewsURL.contains(
+                "http://tc73n4kivdroccekirco7rhgxdg5f3cjvbaapabupeyzrqwv5guq.b32.i2p/win/beta/news.su3")) {
           logger.info(
               "checked router.backupNewsURL config, containes win/beta in a service install, invalid update type");
           if (i2pRouter.saveConfig("router.backupNewsURL",
@@ -195,7 +197,8 @@ public class WinLauncher extends CopyConfigDir {
       }
       String updateURL = i2pRouter.getConfigSetting("router.updateURL");
       if (updateURL != null) {
-        if (updateURL.contains("http://ekm3fu6fr5pxudhwjmdiea5dovc3jdi66hjgop4c7z7dfaw7spca.b32.i2p/i2pwinupdate.su3")) {
+        if (updateURL.contains(
+                "http://ekm3fu6fr5pxudhwjmdiea5dovc3jdi66hjgop4c7z7dfaw7spca.b32.i2p/i2pwinupdate.su3")) {
           logger.info(
               "checked router.updateURL config, containes easy-intall update in a service install, invalid update type");
           if (i2pRouter.saveConfig("router.updateURL",
diff --git a/java/net/i2p/router/WinUpdateProcess.java b/java/net/i2p/router/WinUpdateProcess.java
index 433284c..6952ff3 100644
--- a/java/net/i2p/router/WinUpdateProcess.java
+++ b/java/net/i2p/router/WinUpdateProcess.java
@@ -62,13 +62,22 @@ class WinUpdateProcess implements Runnable {
         env.put("RESTART_I2P", "true");
 
       try {
-        pb.directory(workingDir)
-            .redirectErrorStream(true)
-            .redirectOutput(logFile)
-            .start();
+        Process p = pb.directory(workingDir)
+                        .redirectErrorStream(true)
+                        .redirectOutput(logFile)
+                        .start();
+        exitCode = p.waitFor();
+        if (exitCode != 0)
+          _log.error("Update failed with exit code " + exitCode + " see " +
+                     logFile.getAbsolutePath() + " for more details");
       } catch (IOException ex) {
         _log.error(
-            "Unable to run update-program in background. Update will fail.");
+            "Unable to run update program in background. Update will fail.",
+            ex);
+      } catch (InterruptedException ex) {
+        _log.error(
+            "Unable to run update program in background. Update will fail.",
+            ex);
       }
     } else {
       // If we cant write to the log file and we're on Windows, use the elevator
diff --git a/java/net/i2p/router/WindowsUpdatePostProcessor.java b/java/net/i2p/router/WindowsUpdatePostProcessor.java
index 41fa99a..11bfea7 100644
--- a/java/net/i2p/router/WindowsUpdatePostProcessor.java
+++ b/java/net/i2p/router/WindowsUpdatePostProcessor.java
@@ -39,6 +39,20 @@ public class WindowsUpdatePostProcessor implements UpdatePostProcessor {
                                           String version, File file)
       throws IOException {
     _log.info("Got an update to post-process");
+    if (fileType != SU3File.TYPE_ZIP) {
+      this.positionedFile = moveUpdateInstaller(file);
+      this.version = version;
+
+      if (!hook.compareAndSet(false, true)) {
+        _log.info("shutdown hook was already set");
+        return;
+      }
+
+      _log.info("adding shutdown hook");
+
+      ctx.addFinalShutdownTask(
+          new ZipUpdateProcess(ctx, this::getVersion, this::getFile));
+    }
     if (SystemVersion.isWindows()) {
 
       if (type != UpdateType.ROUTER_SIGNED_SU3 &&
diff --git a/java/net/i2p/router/ZipUpdateProcess.java b/java/net/i2p/router/ZipUpdateProcess.java
new file mode 100644
index 0000000..35c62fe
--- /dev/null
+++ b/java/net/i2p/router/ZipUpdateProcess.java
@@ -0,0 +1,82 @@
+package net.i2p.router;
+
+import java.io.*;
+import java.util.Map;
+import java.util.function.*;
+import net.i2p.I2PAppContext;
+import net.i2p.router.*;
+import net.i2p.util.Log;
+
+public class ZipUpdateProcess implements Runnable {
+  private final RouterContext ctx;
+  private final Supplier<String> versionSupplier;
+  private final Supplier<File> fileSupplier;
+  private final Log _log;
+
+  ZipUpdateProcess(RouterContext ctx, Supplier<String> versionSupplier,
+                   Supplier<File> fileSupplier) {
+    this.ctx = ctx;
+    this.versionSupplier = versionSupplier;
+    this.fileSupplier = fileSupplier;
+    this._log = ctx.logManager().getLog(ZipUpdateProcess.class);
+  }
+
+  private File workDir() throws IOException {
+    if (ctx != null) {
+      File workDir =
+          new File(ctx.getConfigDir().getAbsolutePath(), "i2p_update_win");
+      if (workDir.exists()) {
+        if (workDir.isFile())
+          throw new IOException(workDir +
+                                " exists but is a file, get it out of the way");
+        return workDir;
+      } else {
+        workDir.mkdirs();
+      }
+      return workDir;
+    }
+    return null;
+  }
+
+  private void unzipUpdateInstaller() throws IOException {
+    String version = versionSupplier.get();
+    File file = fileSupplier.get();
+    if (file == null)
+      return;
+
+    File workingDir = workDir();
+    File logFile = new File(workingDir, "log-" + version + ".txt");
+
+    // check if we can write to the log file. If we can, use the
+    // ProcessBuilder to run the installer.
+    // ProcessBuilder pb = new ProcessBuilder(
+    // file.getAbsolutePath(), "/S", "/D=" + workingDir.getAbsolutePath());
+    // Map<String, String> env = pb.environment();
+    // env.put("OLD_I2P_VERSION", version);
+    // env.remove("RESTART_I2P");
+
+    int exitCode = ctx.router().scheduledGracefulExitCode();
+    // if (exitCode == Router.EXIT_HARD_RESTART ||
+    //     exitCode == Router.EXIT_GRACEFUL_RESTART)
+    // env.put("RESTART_I2P", "true");
+
+    /*try {
+      pb.directory(workingDir)
+          .redirectErrorStream(true)
+          .redirectOutput(logFile)
+          .start();
+    } catch (IOException ex) {
+      _log.error(
+          "Unable to run update-program in background. Update will fail.", ex);
+    }*/
+  }
+
+  @Override
+  public void run() {
+    try {
+      unzipUpdateInstaller();
+    } catch (IOException ioe) {
+      _log.error("Error running updater, update may fail." + ioe);
+    }
+  }
+}
diff --git a/launcher.sh b/launcher.sh
index 7447d4a..b6de2be 100755
--- a/launcher.sh
+++ b/launcher.sh
@@ -76,10 +76,12 @@ cd java
   net/i2p/router/CopyConfigDir.java \
   net/i2p/router/Elevator.java \
   net/i2p/router/Shell32X.java \
+  net/i2p/router/WindowsServiceUtil.java \
   net/i2p/router/WinLauncher.java \
   net/i2p/router/WindowsUpdatePostProcessor.java \
   net/i2p/router/WinUpdateProcess.java \
-  net/i2p/router/WindowsServiceUtil.java
+  net/i2p/router/WindowsServiceUtil.java \
+  net/i2p/router/ZipUpdateProcess.java
 
 cd ..