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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I'm John and in the daytime I am the Chief Technology Officer of VFTS.NET - a consulting firm that specializes on development and deployment of business solutions created with .NET framework on Windows platform and Windows infrastructure projects. I am a core member of the Philippine Windows Users Group, a contributor at the Microsoft Philippines Community forums and I regularly conduct technical sessions as well as other Microsoft technology events. I am a Microsoft Most Valuable Professional in the Cloud and Datacenter Management Technical Expertise but away from any keyboard I spend hours reading books, travel, explore, and being busy with my dog named Floppy.

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