I've found this to still be an issue with the latest version of iCUE (v3.17.94 - Plus a K95 RGB Platinum). I've found that the process is causing the WMI Service Provider (WMIPrvSE) to absolutely SPAM the registry - it almost like it is constantly scanning for new hardware in a tight loop without any kind of sleep.
I've opened a ticket with Corsair support giving them screenshots, and dumps from Sysinternals Process Monitor and Process Explorer.
* Fingers crossed *
WMIPrvSE Process Monitor Log.zip
WMIPrvSE Process Info.zip