1.I've installed Jenkins Server on Windows 2k8 R2 and the Version is 1.647.
2.Installed vSphere plugin 2.11. Then created a cloud as per the documentation.
3. Added a node by selecting the option 'Slave virtual computer running under vSphere Cloud'.
4. while adding the node, checked Test VM Connection to find the VM is present in Cloud and it found.
5. But when trying to launch the agent getting the below error:

Access is denied. [0x00000005]
at org.jinterop.dcom.core.JIComServer.init(JIComServer.java:542)
at org.jinterop.dcom.core.JIComServer.initialise(JIComServer.java:458)
at org.jinterop.dcom.core.JIComServer.<init>(JIComServer.java:427)
at org.jvnet.hudson.wmi.WMI.connect(WMI.java:41)
at hudson.os.windows.ManagedWindowsServiceLauncher.launch(ManagedWindowsServiceLauncher.java:107)
at hudson.slaves.SlaveComputer$1.call(SlaveComputer.java:170)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
Caused by: rpc.FaultException: Received fault. (unknown)
at rpc.ConnectionOrientedEndpoint.call(ConnectionOrientedEndpoint.java:142)
at rpc.Stub.call(Stub.java:112)
at org.jinterop.dcom.core.JIComServer.init(JIComServer.java:538)
... 10 more
6. As per the suggestion in the error went to this site: https://wiki.jenkins-ci.org/display/JENKINS/Windows+slaves+fail+to+start+via+DCOM
and checked all the settings mentioned.
7. But all the settings done now getting the below error:

[adima02-8x86] Starting Virtual Machine...
[adima02-8x86] VM already powered on
[adima02-8x86] Waiting for VMTools
[adima02-8x86] VM Tools are running
[adima02-8x86] Finished wait for VMTools
Connecting to adima02-8x86
ERROR: Message not found for errorCode: 0xC0000034
ha:AAAAWB+LCAAAAAAAAP9b85aBtbiIQSmjNKU4P08vOT+vOD8nVc8DzHWtSE4tKMnMz/PLL0ldFVf2c+b/lb5MDAwVRQxSaBqcITRIIQMEMIIUFgAAckCEiWAAAAA=org.jinterop.dcom.common.JIException: Message not found for errorCode: 0xC0000034
at org.jinterop.winreg.smb.JIWinRegStub.winreg_OpenHKCR(JIWinRegStub.java:121)
at org.jinterop.dcom.core.JIComServer.initialise(JIComServer.java:479)
at org.jinterop.dcom.core.JIComServer.<init>(JIComServer.java:427)
at org.jvnet.hudson.wmi.WMI.connect(WMI.java:59)
at hudson.os.windows.ManagedWindowsServiceLauncher.launch(ManagedWindowsServiceLauncher.java:218)
at org.jenkinsci.plugins.vSphereCloudLauncher.launch(vSphereCloudLauncher.java:199)
at hudson.slaves.SlaveComputer$1.call(SlaveComputer.java:253)
at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

I am attaching all the stack trace for reference.