A couple of days ago I upgraded from PD 14 to 16. I did skip version 15. Too after upgrading I installed fresh Ubuntu Mate 20.04 with Compiz. I use it pretty much all day developing. I also have an 18.04 version and I have the same issue. So I do not believe it is related to VM. Under heavy use entire machine locks up, fans start spinning up and the machine shut itself down at random times. If I do not have Parallels running machine is stable all day. I am ruing in rBP late 2013 (10.15.6 (19G2021)) and parallels 16 (ParallelsDesktop-16.0.0-48916.dmg). I called support a couple of times and they are as useless as a donkey. They struggle with their own product trying to find "Take snapshot". On two occasions I was told someone from higher support will contact me within 24 hours and ... well, no one did. So I called today again and I explain again my issue (Original Ticket number 2786294). After spending 30 min on the phone I lost confidence in support. I asked to do logmein123 with him. After he joined I could quickly see that he is not prepared at all. I decided to drop that call after 30 min since it was pointless waiting for support finding his way around his own product. So random lockup is my primary problem since I can not work. The other issue I also reported and added my comment in another post was trying to copy a file from within VM using "cp" command from Mac shared folder $ cp /media/psf/VShare/dev-setup.tar . cp: skipping file '/media/psf/VShare/dev-setup.tar', as it was replaced while being copied I also noticed that VM at times is just stopped responding for 30 sec? and sometimes come back and at times machine does shut itself down. Again when Parallels is not running I do not have any issues. Under PD 14 I never had any stability issues. I moved to 16 since I needed to install 20.04 VM and 14 had issues installing guests. Here is what was done so far. Technical data was uploaded to the ticket I did boot to recovery and did check Data partition - no errors Uninstalled and reinstalled PD 16 Reinstalled guest tools Running all latest updates on all involved software. Support (if you exists) please let me know what I should try and what info you need to get this resolved.