Sorry for the disturbance, the issue seems to be solved. The fault has been caused by the KB5009624 update for Windows Server 2012 R2. The fix is provided within KB5010794. The Hyper-V returned to work state through its applying. Some useful links: [URL] [URL] Thanks and have a nice day.
Hello, Having trouble executing virtual machines on Hyper-V of Windows 2012 R2 Standard at PE R520. It just doesn’t start VMs, complaining that “hypervisor not running” (event 20148, Hyper-V-VMMS) and “Virtualization infrastructure driver (VID) not working” (event 15350, Hyper-V-VMMS). Turning “virtualization technology” and “execute disable” CPU features in BIOS on and off and on again (reboots in between) gave nothing. The BIOS interface doesn’t provide a way to adjust the “virtualization technology” any deeper, f.ex., enable or disable only VT-d or smth. as a part of VT. Some people out there have succeeded with it adjusting some particular CPU features in BIOS, but with PE R520 I can see to only turn VT feature ON or OFF as a whole, via OMSA or the console. Executing “bcdedit /set hypervisorlaunchtype auto” with administrative privileges gave the same nothing. As experienced, Hyper-V on Windows 2008 R2, previously hosted on the platform, had none of such a weird complication. Among CPU attributes, everything is enabled but the “Demand Based Switching(DBS)” and “Turbo Mode” ones. Can I do anything aside of returning to W2008R2 to solve this issue and to make the Hyper-V on W2012R2 to work properly on R520? Or may it be the issue doesn’t have any roots in the R520 platform specifics? Some details: BIOS version: 2.7.0 CPU: Intel(R) Xeon(R) CPU E5-2440 0 @ 2.40GHz (1 piece) 64 GB of DDR3 RAM Thanks a lot for your attention in advance!
R520 bios settings to start Hyper-V on Windows Server 2012 R2