diff --git a/api/logic/minecraft/launch/LauncherPartLaunch.cpp b/api/logic/minecraft/launch/LauncherPartLaunch.cpp
index b641968c..3f9cf05a 100644
--- a/api/logic/minecraft/launch/LauncherPartLaunch.cpp
+++ b/api/logic/minecraft/launch/LauncherPartLaunch.cpp
@@ -28,6 +28,27 @@ LauncherPartLaunch::LauncherPartLaunch(LaunchTask *parent) : LaunchStep(parent)
 	connect(&m_process, &LoggedProcess::stateChanged, this, &LauncherPartLaunch::on_state);
 }
 
+#ifdef Q_OS_WIN
+// returns 8.3 file format from long path
+#include <windows.h>
+QString shortPathName(const QString & file)
+{
+	auto input = file.toStdWString();
+	std::wstring output;
+	long length = GetShortPathNameW(input, NULL, 0);
+	output.resize(length);
+	GetShortPathNameW(input,output,length);
+	QString ret = QString::fromStdWString(output);
+	return ret;
+}
+#endif
+
+// if the string survives roundtrip through local 8bit encoding...
+bool fitsInLocal8bit(const QString & string)
+{
+	return string == QString::fromLocal8Bit(string.toLocal8Bit());
+}
+
 void LauncherPartLaunch::executeTask()
 {
 	auto instance = m_parent->instance();
@@ -45,7 +66,44 @@ void LauncherPartLaunch::executeTask()
 	// make detachable - this will keep the process running even if the object is destroyed
 	m_process.setDetachable(true);
 
-	args << "-jar" << FS::PathCombine(ENV.getJarsPath(), "NewLaunch.jar");
+	auto classPath = minecraftInstance->getClassPath();
+	classPath.prepend(FS::PathCombine(ENV.getJarsPath(), "NewLaunch.jar"));
+
+	auto natPath = minecraftInstance->getNativePath();
+#ifdef Q_OS_WIN
+	if (!fitsInLocal8bit(natPath))
+	{
+		args << "-Djava.library.path=" + shortPathName(natPath);
+	}
+	else
+	{
+		args << "-Djava.library.path=" + natPath;
+	}
+#else
+	args << "-Djava.library.path=" + natPath;
+#endif
+
+	args << "-cp";
+#ifdef Q_OS_WIN
+	QStringList processed;
+	for(auto & item: classPath)
+	{
+		if (!fitsInLocal8bit(item))
+		{
+			processed << shortPathName(item);
+		}
+		else
+		{
+			processed << item;
+		}
+	}
+	args << processed.join(';');
+#else
+	args << classPath.join(':');
+#endif
+	args << "org.multimc.EntryPoint";
+
+	qDebug() << args.join(' ');
 
 	QString wrapperCommandStr = instance->getWrapperCommand().trimmed();
 	if(!wrapperCommandStr.isEmpty())
diff --git a/libraries/launcher/org/multimc/Utils.java b/libraries/launcher/org/multimc/Utils.java
index 860c0864..94b2eaa9 100644
--- a/libraries/launcher/org/multimc/Utils.java
+++ b/libraries/launcher/org/multimc/Utils.java
@@ -67,77 +67,6 @@ public class Utils
 		return sb.toString();
 	}
 
-	/**
-	 * Adds the specified library to the classpath
-	 *
-	 * @param s the path to add
-	 * @throws Exception
-	 */
-	public static void addToClassPath(String s) throws Exception
-	{
-		File f = new File(s);
-		URL u = f.toURI().toURL();
-		URLClassLoader urlClassLoader = (URLClassLoader) ClassLoader.getSystemClassLoader();
-		Class urlClass = URLClassLoader.class;
-		Method method = urlClass.getDeclaredMethod("addURL", new Class[]{URL.class});
-		method.setAccessible(true);
-		method.invoke(urlClassLoader, new Object[]{u});
-	}
-
-	/**
-	 * Adds many libraries to the classpath
-	 *
-	 * @param jars the paths to add
-	 */
-	public static boolean addToClassPath(List<String> jars)
-	{
-		boolean pure = true;
-		// initialize the class path
-		for (String jar : jars)
-		{
-			try
-			{
-				Utils.addToClassPath(jar);
-			} catch (Exception e)
-			{
-				System.err.println("Unable to load: " + jar);
-				e.printStackTrace(System.err);
-				pure = false;
-			}
-		}
-		return pure;
-	}
-
-	/**
-	 * Adds the specified path to the java library path
-	 *
-	 * @param pathToAdd the path to add
-	 * @throws Exception
-	 */
-	@Deprecated
-	public static void addLibraryPath(String pathToAdd) throws Exception
-	{
-		final Field usrPathsField = ClassLoader.class.getDeclaredField("usr_paths");
-		usrPathsField.setAccessible(true);
-
-		//get array of paths
-		final String[] paths = (String[]) usrPathsField.get(null);
-
-		//check if the path to add is already present
-		for (String path : paths)
-		{
-			if (path.equals(pathToAdd))
-			{
-				return;
-			}
-		}
-
-		//add the new path
-		final String[] newPaths = Arrays.copyOf(paths, paths.length + 1);
-		newPaths[newPaths.length - 1] = pathToAdd;
-		usrPathsField.set(null, newPaths);
-	}
-
 	/**
 	 * Finds a field that looks like a Minecraft base folder in a supplied class
 	 *
diff --git a/libraries/launcher/org/multimc/onesix/OneSixLauncher.java b/libraries/launcher/org/multimc/onesix/OneSixLauncher.java
index f057e55a..8f0a498f 100644
--- a/libraries/launcher/org/multimc/onesix/OneSixLauncher.java
+++ b/libraries/launcher/org/multimc/onesix/OneSixLauncher.java
@@ -214,32 +214,6 @@ public class OneSixLauncher implements Launcher
 			return -1;
 		}
 
-		// add libraries to classpath
-		if(!Utils.addToClassPath(libraries))
-		{
-			System.err.println("Halting launch due to previous errors.");
-			return -1;
-		}
-
-		// set the native libs path... the brute force way
-		try
-		{
-			System.setProperty("java.library.path", nativePath);
-			System.setProperty("org.lwjgl.librarypath", nativePath);
-			System.setProperty("net.java.games.input.librarypath", nativePath);
-			// by the power of reflection, initialize native libs again. DIRTY!
-			// this is SO BAD. imagine doing that to ld
-			Field fieldSysPath = ClassLoader.class.getDeclaredField("sys_paths");
-			fieldSysPath.setAccessible( true );
-			fieldSysPath.set( null, null );
-		}
-		catch (Exception e)
-		{
-			System.err.println("Failed to set the native library path:");
-			e.printStackTrace(System.err);
-			System.err.println("Minecraft might fail to launch...");
-		}
-
 		// grab the system classloader and ...
 		cl = ClassLoader.getSystemClassLoader();