diff --git a/sandbox-apis/virtualbox/src/main/java/org/jclouds/virtualbox/functions/admin/UnregisterMachineIfExists.java b/sandbox-apis/virtualbox/src/main/java/org/jclouds/virtualbox/functions/admin/UnregisterMachineIfExists.java
new file mode 100644
index 0000000000..08d2d25668
--- /dev/null
+++ b/sandbox-apis/virtualbox/src/main/java/org/jclouds/virtualbox/functions/admin/UnregisterMachineIfExists.java
@@ -0,0 +1,67 @@
+/*
+ * Licensed to jclouds, Inc. (jclouds) under one or more
+ * contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  jclouds licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.jclouds.virtualbox.functions.admin;
+
+
+import com.google.common.base.Function;
+import org.jclouds.compute.reference.ComputeServiceConstants;
+import org.jclouds.logging.Logger;
+import org.jclouds.virtualbox.domain.ErrorCode;
+import org.virtualbox_4_1.CleanupMode;
+import org.virtualbox_4_1.IMachine;
+import org.virtualbox_4_1.VBoxException;
+import org.virtualbox_4_1.VirtualBoxManager;
+
+import javax.annotation.Nullable;
+import javax.annotation.Resource;
+import javax.inject.Named;
+
+public class UnregisterMachineIfExists implements Function<String, Void> {
+
+   @Resource
+   @Named(ComputeServiceConstants.COMPUTE_LOGGER)
+   protected Logger logger = Logger.NULL;
+
+   private VirtualBoxManager manager;
+   private CleanupMode mode;
+
+   public UnregisterMachineIfExists(VirtualBoxManager manager, CleanupMode mode) {
+      this.manager = manager;
+      this.mode = mode;
+   }
+
+   @Override
+   public Void apply(@Nullable String vmName) {
+      try {
+         IMachine machine = manager.getVBox().findMachine(vmName);
+         machine.unregister(mode);
+      } catch (VBoxException e) {
+         ErrorCode errorCode = ErrorCode.valueOf(e);
+         switch (errorCode) {
+            case VBOX_E_OBJECT_NOT_FOUND:
+               logger.debug("Machine %s does not exists, cannot unregister", vmName);
+               break;
+            default:
+               throw e;
+         }
+      }
+      return null;
+   }
+}
diff --git a/sandbox-apis/virtualbox/src/test/java/org/jclouds/virtualbox/functions/IsoToIMachineLiveTest.java b/sandbox-apis/virtualbox/src/test/java/org/jclouds/virtualbox/functions/IsoToIMachineLiveTest.java
index eb7286d382..0f5d194a21 100644
--- a/sandbox-apis/virtualbox/src/test/java/org/jclouds/virtualbox/functions/IsoToIMachineLiveTest.java
+++ b/sandbox-apis/virtualbox/src/test/java/org/jclouds/virtualbox/functions/IsoToIMachineLiveTest.java
@@ -36,8 +36,12 @@ import org.jclouds.domain.Credentials;
 import org.jclouds.json.Json;
 import org.jclouds.json.config.GsonModule;
 import org.jclouds.virtualbox.BaseVirtualBoxClientLiveTest;
+import org.jclouds.virtualbox.functions.admin.UnregisterMachineIfExists;
+import org.testng.annotations.BeforeClass;
 import org.testng.annotations.BeforeGroups;
+import org.testng.annotations.BeforeTest;
 import org.testng.annotations.Test;
+import org.virtualbox_4_1.CleanupMode;
 import org.virtualbox_4_1.IMachine;
 import org.virtualbox_4_1.VirtualBoxManager;
 
@@ -69,9 +73,9 @@ public class IsoToIMachineLiveTest extends BaseVirtualBoxClientLiveTest {
    public void setUp() throws Exception {
       identity = "toor";
       credential = "password";
+      new UnregisterMachineIfExists(manager, CleanupMode.Full).apply(vmName);
    }
 
-   @Test
    public void testCreateImageMachineFromIso() throws Exception {
 
       VirtualBoxManager manager = (VirtualBoxManager) context.getProviderSpecificContext().getApi();
diff --git a/sandbox-apis/virtualbox/src/test/java/org/jclouds/virtualbox/functions/admin/UnregisterMachineIfExistsTest.java b/sandbox-apis/virtualbox/src/test/java/org/jclouds/virtualbox/functions/admin/UnregisterMachineIfExistsTest.java
new file mode 100644
index 0000000000..e0c3628c4d
--- /dev/null
+++ b/sandbox-apis/virtualbox/src/test/java/org/jclouds/virtualbox/functions/admin/UnregisterMachineIfExistsTest.java
@@ -0,0 +1,56 @@
+/*
+ * Licensed to jclouds, Inc. (jclouds) under one or more
+ * contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  jclouds licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.jclouds.virtualbox.functions.admin;
+
+import org.testng.annotations.Test;
+import org.virtualbox_4_1.*;
+
+import java.util.Collections;
+import java.util.List;
+
+import static org.easymock.classextension.EasyMock.createMock;
+import static org.easymock.classextension.EasyMock.expect;
+import static org.easymock.classextension.EasyMock.*;
+
+@Test(groups = "unit", testName = "UnregisterMachineIfExistsTest")
+public class UnregisterMachineIfExistsTest {
+
+   @Test
+   public void testUnregisterExistingMachine() throws Exception {
+      VirtualBoxManager manager = createMock(VirtualBoxManager.class);
+      IVirtualBox vBox = createMock(IVirtualBox.class);
+      IMachine registeredMachine = createMock(IMachine.class);
+      List<IMedium> mediums = Collections.emptyList();
+
+      CleanupMode mode = CleanupMode.Full;
+      String vmName = "jclouds-image-example-machine";
+
+      expect(manager.getVBox()).andReturn(vBox).anyTimes();
+      expect(vBox.findMachine(vmName)).andReturn(registeredMachine);
+
+      expect(registeredMachine.unregister(mode)).andReturn(mediums);
+      expectLastCall().anyTimes();
+
+      replay(manager, vBox, registeredMachine);
+
+      new UnregisterMachineIfExists(manager, mode).apply(vmName);
+   }
+
+}