@KorkyPlunger, our engineers asked me to pass huge thank to your on their behalf, we all really appreciate your help. But to advance in this investigation I dare to ask you for more tech data from your VM. In particular, we need several Windows performance reports collected at different conditions: with Parallels hypervisor and high CPU usage by CompatTelRunner.exe, with Apple hypervisor and CPU usage by CompatTelRunner.exe. Optionally, another report with Parallels hypervisor and heavy VM load with Visual Studio. Here are instructions how to install WPR and collect reports: Download Windows ADK according to the Windows version using the link: https://docs.microsoft.com/en-us/windows-hardware/get-started/adk-install Install Windows Performance Toolkit by running the installer downloaded in the step 1. Boot to Windows VM. From Start menu run Windows Performance Recorder. Change Performance scenario on the right pane to General and Logging mode to Memory then check the following items under Resource Analysis: CPU usage Disk I/O activity File I/O activity Registry I/O activity Networking I/O activity Once done press Start button, then choose a path where to save the resulting file and press Save button. In the appeared window, once Windows Performance Recorder suggest restarting Windows press OK button to start recording a trace. After the Windows has restarted, launch Windows Performance Recorder again to finish collecting the trace and start recording the results into the file. After the file is created, upload the resulting file to the Parallels file share (http://kb.parallels.com/en/9101) and attach the link to the file to the bug.