2351074 - Cannot identify IIS from SAPHostControl WebService Diagnostics Agent Error - Solution Manager 7.1

Error appears in the Diagnostics Agent log:

" Error Cannot identify IIS from SAPHostControl WebService.

[EXCEPTION]
javax.xml.rpc.soap.SOAPFaultException: Failed to open key 'HKEY_LOCAL_MACHINE\Software\Microsoft\InetStp': The system cannot find the file specified.
at com.sap.engine.services.webservices.jaxrpc.wsdl2java.soapbinding.MimeHttpBinding.buildFaultException(MimeHttpBinding.java:747)
at com.sap.engine.services.webservices.jaxrpc.wsdl2java.soapbinding.MimeHttpBinding.processDocumentFault(MimeHttpBinding.java:870)
at com.sap.engine.services.webservices.jaxrpc.wsdl2java.soapbinding.MimeHttpBinding.call(MimeHttpBinding.java:1454)
at com.sap.smd.agent.wsclients.saphostcontrol.SAPHostControlStub.getCIMObject(SAPHostControlStub.java:827)
at com.sap.smd.agent.wsclients.saphostcontrol.SAPHostControlStub.getCIMObject(SAPHostControlStub.java:843)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 

[...]"

Same error can be seen in the Agent Administration for the Diagnostics Agent

Solution Manager 7.1 

Cannot identify IIS from SAPHostControl WebService, Failed to open key 'HKEY_LOCAL_MACHINE\Software\Microsoft\InetStp': The system cannot find the file specified, javax.xml.rpc.soap.SOAPFaultException: Failed to open key , KBA , SV-SMG-DIA-SRV-AGT , Agent Framework , Problem