Why does the cpuUtilisation value reported in Hardware plugin appears to be high on Windows Netprobes?

The product documentation has now been revised on the expected behaviour of cpuUtilisation as below:
A moving average of the previous five samples of CPU utilisation, unless cpuSmoothing is set to false (see Technical Reference section). Where the host has multiple CPUs, the value shown is the average utilisation of all CPUs.
Note
Use CPU plug-in to monitor each individual CPU for multi-CPU hosts.

It is recommended upgrading the Netprobe if you have an older version.

You may also refer to the Notice of Changes section in the release notes for Geneos GA4.5.
https://www.itrsgroup.com/resources/release-notes