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i've tried every way that i can find to disable hyperv / VBS / credential guard using  Manage Windows Defender Credential Guard (Windows) - Windows security | Microsoft Learn it simply does not work it's not active by group policy, the registry entries do not exist, the bcdedit command fails.... so there is afaics no way to disable it, and my vm's keep running in ULM mode which makes them unreliable and not workable... please Vmware, release v17 asap...

The risk of using the Tech Preview in a production environment is that it is technically beta code and 100% unsupported. You can try it in development to see if it solves the issues you are encountering, but I’d wait for the Workststion 17 official release before deploying to production. 

Yes, I see errors in the event log like this: Faulting application name: dwm.exe, version: 10.0.17763.831, time stamp: 0xd5c9fdea Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000 Exception code: 0x8898009b Fault offset: 0x0000000000000000 Faulting process id: 0x424 Faulting application start time: 0x01d8f6060f16f37b Faulting application path: C:\Windows\system32\dwm.exe Faulting module path: unknown Report Id: af0924aa-f9d3-4fb3-a734-9f82e998b6e4 Faulting package full name: Faulting package-relative application ID: This happens multiple times (9 times in my most recent test), 3 seconds apart, and then the guest changes resolution to 1024x768 and kicks me out to the login screen.

Do any of you see this in the Windows Event Logs of your Guest VM? Faulting application name: dwm.exe, version: 10.0.19041.746, time stamp: 0x6be51595 Faulting module name: KERNELBASE.dll, version: 10.0.19041.1949, time stamp: 0xcb12e58e Exception code: 0x8898009b

I have a little more information on how this fails on my system - VMWare Workstation Pro 16.2.4 build-20089737 Host:  same problem with both Windows 10 and Windows 11 Guest:  same problem with both Windows 10 and Windows 11 This problem did not happen with an earlier version of VMWare Workstation, though I cannot tell you which specific version broke it. The symptom on my system is that any video activity, including Youtube, VLC, WMP and Unity Editor causes the screen to flicker between a black screen and a normal screen at around 2-second intervals.  This flicker occurs around 5 times and then Windows reports "Display Driver Failed to Start" and reverts to 640x480 VGA mode. If I reboot the host then the guest will run normally and video will function for at least that session.  After some time of the host being up, whether VMWare is running or not, new sessions of the guest O/S will fail.  I have not identified a specific action in the host that causes subsequent runs of the guest to fail.  After the guest fails once, it will fail every time, regardless of whether I restart VMWare Workstation between guest sessions.  The only way to get the guest to run properly again is to reboot the host. I have not seen an instance where the guest successfully plays video and then subsequently starts to fail in the same session.  It either fails from the start or succeeds from the start.  In either case, the guest will run without issue until the first attempt to do something with video.  It does not matter whether 3D acceleration is enabled or disabled.

I assume you're talking about the 22H2 Workstation Tech Preview? Evidently Microsoft's dev channel upgrader thinks there's something up with the Tech Preview. Any indication from the upgrader what it thinks the issue is? It's strange that the Tech Preview will install OK after the Windows upgrade so I guess it can't be as incompatible as the upgrader thinks it is. Wonky behavior from a beta version of Workstation and an early pre-beta version of Windows that's never been seen before. Whodathunkit?