diff --git a/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/LaunchedURLClassLoader.java b/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/LaunchedURLClassLoader.java
index 77c97e4817..9d20e04094 100644
--- a/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/LaunchedURLClassLoader.java
+++ b/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/LaunchedURLClassLoader.java
@@ -73,7 +73,12 @@ public class LaunchedURLClassLoader extends URLClassLoader {
 				return urls[0];
 			}
 		}
-		return super.findResource(name);
+		try {
+			return super.findResource(name);
+		}
+		catch (IllegalArgumentException e) {
+			return null;
+		}
 	}
 
 	@Override
diff --git a/spring-boot-tools/spring-boot-loader/src/test/java/org/springframework/boot/loader/LaunchedURLClassLoaderTests.java b/spring-boot-tools/spring-boot-loader/src/test/java/org/springframework/boot/loader/LaunchedURLClassLoaderTests.java
index 6a8320d3d9..a96c72d45d 100644
--- a/spring-boot-tools/spring-boot-loader/src/test/java/org/springframework/boot/loader/LaunchedURLClassLoaderTests.java
+++ b/spring-boot-tools/spring-boot-loader/src/test/java/org/springframework/boot/loader/LaunchedURLClassLoaderTests.java
@@ -21,6 +21,7 @@ import java.net.URL;
 import org.junit.Test;
 
 import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 
 /**
@@ -28,6 +29,19 @@ import static org.junit.Assert.assertTrue;
  */
 public class LaunchedURLClassLoaderTests {
 
+	@Test
+	public void resolveResourceFromWindowsFilesystem() throws Exception {
+		// This path is invalid - it should return null even on Windows.
+		// A regular URLClassLoader will deal with it gracefully.
+		assertNull(getClass().getClassLoader().getResource(
+				"c:\\Users\\user\\bar.properties"));
+		LaunchedURLClassLoader loader = new LaunchedURLClassLoader(new URL[] { new URL(
+				"jar:file:src/test/resources/jars/app.jar!/") }, getClass()
+				.getClassLoader());
+		// So we should too...
+		assertNull(loader.getResource("c:\\Users\\user\\bar.properties"));
+	}
+
 	@Test
 	public void resolveResourceFromArchive() throws Exception {
 		LaunchedURLClassLoader loader = new LaunchedURLClassLoader(new URL[] { new URL(