Hyper-V

Technical articles from Microsoft’s Windows Server core team

Virtualization-Based Security: Enabled by Default

Virtualization-based Security (VBS) uses hardware virtualization features to create and isolate a secure region of memory from the normal operating system. Windows can use this “virtual secure mode” (VSM) to host a number of security solutions, providing them with greatly increased protection from vulnerabilities in the operating system, and preventing the use of malicious exploits […]

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VMware Workstation and Hyper-V – Working Together

Yesterday VMware demonstrated a pre-release version of VMware Workstation with early support for the Windows Hypervisor Platform in the What’s New in VMware Fusion and VMware Workstation session at VMworld. In Windows 10 we have introduced many security features that utilize the Windows Hypervisor.  Credential Guard, Windows Defender Application Guard, and Virtualization Based Security all utilize the

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5/14: Hyper-V HyperClear Update

Four new speculative execution side channel vulnerabilities were announced today and affect a wide array of Intel processors. The list of affected processors includes Intel Xeon, Intel Core, and Intel Atom models. These vulnerabilities are referred to as CVE-2018-12126 Microarchitectural Store Buffer Data Sampling (MSBDS), CVE-2018-12130 Microarchitectural Fill Buffer Data Sampling (MFBDS), CVE-2018-12127 Microarchitectural Load

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Hyper-V HyperClear Mitigation for L1 Terminal Fault

First published on TECHNET on Aug 14, 2018 Introduction A new speculative execution side channel vulnerability was announced recently that affects a range of Intel Core and Intel Xeon processors. This vulnerability, referred to as L1 Terminal Fault (L1TF) and assigned CVE 2018-3646 for hypervisors, can be used for a range of attacks across isolation

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Hyper-V symbols for debugging

First published on TECHNET on Apr 25, 2018 Having access to debugging symbols can be very handy, for example when you are A partner building solutions leveraging Hyper-V, Trying to debug a specific issue, or Searching for bugs to participate in the Microsoft Hyper-V Bounty Program . Starting with symbols for Windows Server 2016 with

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Sneak Peek: Taking a Spin with Enhanced Linux VMs

First published on TECHNET on Feb 28, 2018 **Update: This feature is now generally available. Please see our latest blog post to learn more** Whether you’re a developer or an IT admin, virtual machines are familiar tools that allow users to run entirely separate operating system instances on a host. And despite being a separate

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Looking at the Hyper-V Event Log (January 2018 edition)

First published on TECHNET on Jan 23, 2018 Hyper-V has changed over the last few years and so has our event log structure. With that in mind, here is an update of Ben’s original post in 2009 (“Looking at the Hyper-V Event Log”). This post gives a short overview on the different Windows event log

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Migrating local VM owner certificates for VMs with vTPM

First published on TECHNET on Dec 14, 2017 Whenever I want to replace or reinstall a system which is used to run virtual machines with a virtual trusted platform module (vTPM), I’ve been facing a challenge: For hosts that are not part of a guarded fabric , the new system does need to be authorized

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What’s new in Hyper-V for Windows 10 Fall Creators Update?

First published on TECHNET on Nov 13, 2017 Windows 10 Fall Creators Update has arrived!  While we’ve been blogging about new features as they appear in Windows Insider builds, many of you have asked for a consolidated list of Hyper-V updates and improvements since Creators Update in April. Summary: Quick Create includes a gallery (and

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