Hi we are having the same issue. I upgraded to 15.10 more than a week ago but the CPU and fan problem only started last week. 20 minutes is quite al long time, listening to a fan going wild.
Moving to a new technology provider for updates : does that mean Ivanti is not the provider for this anymore?
Before this I never noticed the 90% CPU usage at startup. Can we expect any improvement on this situation soon?
Please contact support with the diagnostic information from the affected client machine to check the scenario. Please provide this information to support, and we will investigate further. We can provide a hotfix which updates Software updater binaries to fresh versions and set the low priority mode.