Dears,
After upgrading Windows 10 to 1903 virtual machines are unable to boot with error VMware Workstation and Device/Credential Guard are not compatible. VMware workstation can be run after disabling Device/Credentials Guard.
Troubleshooting:
- Hyper-V Feature disabled
- Windows Sandbox disabled
- Device Guard "Turn on Virtualization based security disabled"
But the issue still occurs.
Run the Command Prompt as Administrator
If you don't know how to run Command Prompt as an Administrator, Picture below:
If you done that, Run Command Prompt as Administrator and type this command:
mountvol X: /s
copy %WINDIR%\System32\SecConfig.efi X:\EFI\Microsoft\Boot\SecConfig.efi /Y
bcdedit /create {0cb3b571-2f2e-4343-a879-d86a476d7215} /d "DebugTool" /application osloader
bcdedit /set {0cb3b571-2f2e-4343-a879-d86a476d7215} path "\EFI\Microsoft\Boot\SecConfig.efi"
bcdedit /set {bootmgr} bootsequence {0cb3b571-2f2e-4343-a879-d86a476d7215}
Then Restart for the changes to apply.
If it still doesn't work, Feel free to Reply me.
Hi,
I have got same problem, I just update september update of windows 10 and my vm is not runnable for this error about credentials not compatible with device guard.
I disable all as indicated on instruction and disable any slang of credential guard and similar, but nothing.
I find your reply googling with attonish expression and I try to apply your suggest patch, but I must realize that do not work 
I restart the system but the feel is equals, appear this error on any wmware, linux, windows , bsd linux.
I have workstation 15 on trial. Now I think to unistall all and reinstall wmplayer 15 and try with a simple player wmware after update windows.