Scenario : When trying to upgrade from lower version to rich upgraded SQL Server version its a sanity check to do UPGRADE ADVISORY REPORT.
Cause : When you try to run this report from remote machine this might fail with error message :
and this little above message caused havoc in internet for multiple users trying to run this Advisor during upgrade.
Simple cause is already explained in the error message already recommend to read the error message very carefully without panic.
This is caused due to the service called “REMOTE REGISTRY SERVICE ” on target machine ( where SQL Server is installed ) default this service will be in disabled state during OS configuration, and most of the people did not or wont watch the service very carefully, so just turn on the service to running mode and try connecting, that’s it BOOM.. you are connected and do what ever you want to later.