Okay! I see I wasn't quite as clear as I had hoped! {'-)
1) Yes, the VMWare Workstation Player (part of Workstation Pro), Version 16.1.0 build-17198959.
2) It appears to "Spread": I will run several copies/versions of Windows (mostly 7 and 10) on a Ubuntu host with VMWare Workstation. When this happens, eventually, the issue will occur under all the guests. Thankfully, this doesn't usually last very long! (usually less than a day).
3) Using the same VMWare player software and running Windows OS guests (I think that was clear above, but just to be sure).
4) I have uninstalled and re-installed the whole bundle, the latest was yesterday.
5) Graphics: Well, it's a laptop, so the adapter is difficult! {'-) I'm not suspecting that the driver is the issue due to the intermittent nature of the problem.
6) Because I have had several RESUB (A Ubuntu kind of "reboot") type events because of locking up, I am planning to reload everything from scratch on Monday. I'm going to try and run some good virus software on both the host and guest systems, though I try to keep that sort of thing at bay... It'll work out... eventually!
Thanks for the comments.
k
