Updated Jenkins from 2.7.4 to 2.32.2 and now my agent machines wont connect using Launch method "Let Jenkins control this Windows slave as Windows service". They were working fine on the older version.
I uninstalled and installed agent services on the machines but that didnt help.
Looked into https://wiki.jenkins-ci.org/display/JENKINS/Windows+slaves+fail+to+start+via+DCOM and that didnt help either.
Tried windows slaves version 1.2 and 1.1 still nothing changed.

Here is the error message I get
ERROR: Access is denied. See http://wiki.jenkins-ci.org/display/JENKINS/Windows+slaves+fail+to+start+via+DCOM for more information about how to resolve this.
org.jinterop.dcom.common.JIException: Message not found for errorCode: 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:59)
at hudson.os.windows.ManagedWindowsServiceLauncher.launch(ManagedWindowsServiceLauncher.java:206)
at hudson.slaves.SlaveComputer$1.call(SlaveComputer.java:261)
at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
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