Hi @0ber0n
When performing an upload of log files for a client machine, CVDiagnostics is launched on the client to collect information about the system which is included in the log file upload. CVDiagnostics.log is used to troubleshoot log file collection errors/issues from the client side.
If your CommCell is enabled for Remote Log Collection, support engineers are able to request log files for client machines within your environment associated to the support incident in which they are working on so this is a reason it may be launched if not by a user within your environment.
Did you have a support incident raised for the high CPU utilization and interruption this has caused in the past? We would want to review this further as CVDiagnostics should not be causing a performance issue.
Hope this helps!