When user is not running ipmiviewer as administrator, there will be error:
"Administrator privilege is required to launch KVM during first initialization or Connection failed"
But have you ever heard any user still see the error even after running as administrator?
X10DDW-I
IPMI fw:3.45
IPMIView(2.12.0, Build160804, Latest)
Please reset the IPMI to factory defaults, and that will fix the error from showing up.