Only KSC for now. KIS and KTS still pointing to old 2020. I guess in a few days they will be updated...

Yep,

I download it from official dowloads.

KTS and KIS still pointing to old 2020 version. Guess it will be refreshed soon.

I found something. If I turn off SecureBoot in hyper-v settings for my virtual machine (virtual machine settings-> security) I can install KTS 2020. But when KTS wants to start after install, virtual machine is rebooted. Also, if I restart virtual machine manually I can logon to Windows, but immediately after that virtual machine gets restarted.

DeviceGuard was off when I first tried. So, I'm gettings same error whether deviceguard is on or off.

SecureBoot is already disabled in BIOS.

I have enabled virtualization based security, but still getting the same error:

https://wetransfer.com/downloads/346481f1b6c0779cddf7b1bbd04ec11920181006170312/128d74

Hello. I'm getting following error:

Error 27300. Error installing driver klwtp.sys_x64. Error code: -2147024319.

Install logs and screenshot of the error has been uploaded here:

https://wetransfer.com/downloads/2e1c177f99746321600f75d89e037c5520181003174205/9252b41bc7f46ca5db7bfa6c5732214020181003174205/f7082d

Marko

Still cannot install latest beta build (554) in Hyper-V virtual machine...

Reproduction steps:

Cannot install latest beta (b318) on Hyper-V guest (W10 17134). Hyper-V host is also W10 17134. I'm getting Application installation error. KTS 2019 install fine on the same virtual machine.

Install logs are here:

https://we.tl/AOybcBYscz

Actual result:

KTS2020 should install fine on virtual machine