This guy had a similar problem: [URL] I updated just the RealTek Audio via his instructional and as soon as the update completed my fan shut off and the WavesSysSvc dropped to the bottom of Task manager using 0% CPU and only 2.2MB of RAM.
WavesSysSvc Service Application is running at 25-30% and the fan on the PC is constantly running.  Dell 7490, fresh Windows install.   
WavesSysSvc Service Application High CPU Fan Constantly Rus