I want to put this again because this is boring for me all the time about 1 year or more. it happens sometimes not always, happens every 2 weeks or a month once. yes, It freeze, the windows 10, you say to get the tech report and send it to you, but it freeze I can't do anything even to get the tech report , I have found it is not CPU, It is high disk IO. so all the system, include host MacOS did not respond to any action. slow slow. even to reboot it impossible. no way, then power off mac, after reboot mac then to start parallels it also begins high IO to disk. then freeze. the interesting thing is after several times power-off and reboots it becomes normal. parallels ver 15.1.4 (47270) mac os Catalina, but it also occurs in the previous version of OS and parallels.