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on November 18 2009, 9:36 AM
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TONYSO: Some customers seem to be having trouble when they open up device manager in a VM and see that some devices are listed as “unknown device.” From the Troubleshooting Hyper-V topic on TechNet:
Cause: Device Manager does not recognize devices that are optimized for use in virtual machines and run using Hyper-V until integration services are installed. The unknown devices that are identified in Device Manager differ depending on the guest operating system and may include: VMBus, Microsoft VMBus HID Miniport, Microsoft VMBus Network Adapter, and storvsc miniport.
Some optimized devices are not available for certain guest operating systems. When a device is not supported on a guest operating system, the device will not work. You cannot install the device driver manually to try to make the device work. For a list of the devices that are available on each supported guest operating system, see http://go.microsoft.com/fwlink/?LinkID=128037.
Solution: If the guest operating system is supported, integration services are available for that operating system. After you install the integration services, Device Manager will recognize the devices that are available for that guest operating system.
To install the guest operating system
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Open Hyper-V Manager. Click Start, point to Administrative Tools, and then click Hyper-V Manager.
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Connect to the virtual machine. From the Virtual Machines section of the results pane, using one of the following methods:
- Right-click the name of the virtual machine and click Connect.
- Select name of the virtual machine. In the Action pane, click Connect.
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The Virtual Machine Connection tool opens.
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From the Action menu in the Virtual Machine Connection window, click Start.
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The virtual machine starts, searches the startup devices, and loads the installation package.
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Proceed through the installation.
Continue:
TONYSO Hyper-V How To Fix Hyper-V Top Issue Unknown Devices
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