Tag Archives: Hyper-V

Windows Server 2019/2022: Out-of-Band Updates fixes Hyper-V Issue (Dec. 20, 2022)

Posted on 2022-12-21 by guenni

[German]The security updates rolled out by Microsoft on the December 2022 patchday lead to problems with Hyper-V in certain constellations. New VMs can no longer be created, existing VMs have problems with Ethernet connections, etc. Microsoft has now released a … Continue reading →

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Windows Server 2019/2022: December 2022 security updates cause Hyper-V issues

Posted on 2022-12-15 by guenni

[German]The security updates rolled out by Microsoft on the December 2022 patchday lead to problems with Hyper-V in certain constellations. New VMs can no longer be created, existing VM have problems with Ethernet connections, etc. Microsoft has admitted to these … Continue reading →

Posted in issue, Update, Virtualization, Windows | Tagged , , , , , | 2 Comments

How to find weak passwords in Active Directory and eliminate them with PowerShell

[Sponsored Post]Weak or compromised passwords are a known gateway for attackers. If you are able to identify which users in Active Directory (AD) are threatened by this, then PowerShell can help to remedy it. However, PowerShell scripts cannot eliminate basic AD deficits, other tools are needed for this. More ...

Review: Fix for Hyper-V Host Startup Problem in Windows (January 2022)

Posted on 2022-01-22 by guenni

[Geman]The January 11, 2022 security updates for Windows Server 2012/R2 resulted in the Hyper-V host subsequently failing to start. As of January 17, 2022, Microsoft then released special updates to correct this issue. Here is a follow-up on this issue. … Continue reading →

Posted in Update, Virtualization, Windows | Tagged , , , , | 3 Comments
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Installing Windows 10/11 in Hyper-V 2nd Generation

Posted on 2022-01-22 by guenni

[German]Installing Windows 10 or Windows 11 in virtual environments can present some challenges. Depending on the hypervisor, the installation may even fail completely. Blog reader Thomas S. emailed me back in December 2021 with his experiences installing Windows 10 as … Continue reading →

Posted in Virtualization | Tagged , , , | 1 Comment

Windows Server 2012/R2: January 2022 Update KB5009586 bricks Hyper-V Host

Posted on 2022-01-12 by guenni

[German]Microsoft Hyper-V users running Windows Server 2012/R2 should be cautious about installing update security update KB5009586 or KB5009624 for Windows Server 2012/R2. The security updates released on January 11, 2022 have several unpleasant collateral damages at once. After installing the … Continue reading →

Posted in Security, Update, Virtualization, Windows | Tagged , , , | 31 Comments
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Windows Server 2019: Intel RSC support for NICs disabled in Hyper-V, storage stacks writes operations as write-throughs

Posted on 2021-01-27 by guenni

[German]Another small piece of information for administrators of a Hyper-V cluster under Windows Server 2019. It looks like Intel has disabled RSC support for all NICs on the driver side as of release 1903. In addition, storage stacks write operations … Continue reading →

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Windows 10: Activated Hyper-V /Sandbox creates a 0-day Exploit

Posted on 2020-09-12 by guenni

[German]A reverse engineer bumped a vulnerability in Windows 10 in conjunction with the Hyper-V/Sandbox feature. Activating Hyper-V or the sandbox opens a 0-day vulnerability that can be used to attack the system. Advertising

Posted in Security, Virtualization, Windows | Tagged , , | 1 Comment

Windows 10 / Server 2019: Slow Network on Hyper-V & Bar Metal

Posted on 2020-02-21 by guenni

[German]A German blog reader has pointed out recently a problem with Windows 10 and Windows Server 2019 regarding poor network performance (low throughput) in connection with Hyper-V guests (but also on bare metal Windows 10 clients without virtualization). The reason … Continue reading →

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Hyper-V 2nd Gen: Can’t install an operating system

Posted on 2019-08-25 by guenni

[German]In Hyper-V, you may not be able to install guest operating systems in Generation 2 VMs. The installation process ends with a 'PXE Network boot using IPv4 …' message. Advertising

Posted in issue, Virtualization, Windows | Tagged , | 3 Comments

RDP vulnerability puts Hyper-V at risk

Posted on 2019-08-10 by guenni

[German]There is a vulnerability in Microsoft's Remote Desktop Protocol (RDP) that can be exploited to break out of guest VMs running on Hyper-V in Windows 10/Azure. Advertising

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