When installing an IBM Tivoli Enterprise Monitoring Server on Windows, a message
appears advising that the software is from an unknown publisher. What is the cause of this?

A.
missing entry in the Trusted Zone — the error can be ignored and the installation continued

B.
unsupported operating system — terminate the installation and install on a supported
operating system

C.
inappropriate version of the product — terminate the installation and contact IBM for a
certified version of the installer

D.
invalid or missing certificate — terminate the installation and contact a Certificate
Authority to obtain a valid certificate