PSI fails with error message: "Unable to delete file java.exe" in Windchill

• PTC Solution Installer (PSI) fails to update Java with below error while updating Windchill:

 Unable to delete file java.exe 

• PSI fails during datecode update with below error: 

Unable to delete file java.exe

• The installation log file <WT_HOME>\Java\installer\logs\JAVASDK_ptcinstall.log contains following errors

The installation is aborting due to an unexpected error.
InstallerData\javasdk\uninstall.xml:8: Unable to delete file <WT_HOME>\Java\bin\java.exe

The installation is aborting due to an unexpected error.
InstallerData\javasdk\uninstall.xml:8: Unable to delete file <WT_HOME>\Java\bin\java.dll

• Stack trace

org.apache.tools.ant.taskdefs.Delete.handle(Delete.java:719) 
org.apache.tools.ant.taskdefs.Delete.execute(Delete.java:697) 
org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:293) 
sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source) 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
java.lang.reflect.Method.invoke(Method.java:498) 
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) 
org.apache.tools.ant.Task.perform(Task.java:348) 
org.apache.tools.ant.Target.execute(Target.java:435) 
org.apache.tools.ant.Target.performTasks(Target.java:456) 
org.apache.tools.ant.Project.executeSortedTargets(Project.java:1405) 
org.apache.tools.ant.Project.executeTarget(Project.java:1376) 
org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) 
org.apache.tools.ant.Project.executeTargets(Project.java:1260) 
com.ptc.windchill.install.actions.AntUtil.executeAntScript(AntUtil.java:231) 
com.ptc.windchill.install.actions.AntUtil.executeAntScript(AntUtil.java:124) 
com.ptc.windchill.install.actions.AntUtil.executeAntScript(AntUtil.java:90) 
com.ptc.windchill.install.actions.AntUtil.executeAntScript(AntUtil.java:65) 
com.ptc.windchill.install.actions.AntTargetsAction.executeAntScript(AntTargetsAction.java:206) 
com.ptc.windchill.install.actions.AntTargetsAction.process(AntTargetsAction.java:122) 
com.ptc.windchill.install.framework.InstallAction.run(InstallAction.java:468) 
com.ptc.windchill.install.framework.InstallAction.install(InstallAction.java:313) 
com.zerog.ia.installer.actions.CustomAction.installSelf(Unknown Source) 
com.zerog.ia.installer.InstallablePiece.install(Unknown Source) 
com.zerog.ia.installer.InstallablePiece.install(Unknown Source) 
com.zerog.ia.installer.GhostDirectory.install(Unknown Source) 
com.zerog.ia.installer.InstallablePiece.install(Unknown Source) 
com.zerog.ia.installer.Installer.install(Unknown Source) 
com.zerog.ia.installer.LifeCycleManager.consoleInstallMain(Unknown Source) 
com.zerog.ia.installer.LifeCycleManager.executeApplication(Unknown Source) 
com.zerog.ia.installer.Main.main(Unknown Source) 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
java.lang.reflect.Method.invoke(Method.java:498) 
com.zerog.lax.LAX.launch(Unknown Source) 
com.zerog.lax.LAX.main(Unknown Source)