Cannot connect to a virtual machine on Windows Server 2008 Hyper-v if the VMMS certificate has expired

If you have a problem connecting to a Hyper-V VM with error: Cannot connect to the virtual machine because the authentication certificate is expired or invalid or when you try to start a VM and an error that YourVMNAme failed to initialize with an Unspecified Error “0x80004005”. This is because the Hyper-V Management Service certificate has expired.

This is very fixable by just applying an update: KB967902 for Windows Server 2008 x64 Edition. So if you have your WSUS administration or its a standalone server, better apply this hotfix to prevent what happened to me or to fix this issue.

More info is available where I found the fix here: or download the hotfix directly here:



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John is currently creating digital assets that protects people and their future, a technical trainer and a full time geek specializing on development and deployment of innovations created with .NET framework on Windows platform as well as Windows infrastructure projects. He is the primary contact of the Philippine Windows Users Group, a contributor at the Microsoft Philippines Community forums and regularly conducts community sessions as well as other Microsoft technology events. John owns the Busy Saving The World Techblog.

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