Tag Archives: Hyper-V

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

[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 , , , , | 2 Comments


Installing Windows 10/11 in Hyper-V 2nd Generation

[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

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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 ...

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

[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


Windows Server 2019: Intel RSC support for NICs disabled in Hyper-V, storage stacks writes operations as write-throughs

[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

[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

[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

[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

[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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Windows 10 V1903: IP resolution bug in Hyper-V switch

[German]In Windows 10 May 2019 Update (version 1903) and possibly also in October 2018 Update (version 1809) there is a bug in the 'Default Switch' which leads to issues with Windows Sandbox, Mobile Hotspot or with Windows Containers – they … Continue reading

Posted in issue, Virtualization, Windows | Tagged , , | 4 Comments

Hyper-V VM Shutdown issue in Windows Server 2019

[German]There is an issue with Hyper-V on Windows Server 2019 (and possibly Windows Server 2016). The Hyper-V platform cannot shut down virtual machines properly. Advertising

Posted in issue, Virtualization, Windows | Tagged , , | 20 Comments