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Windows device manager shows yellow bang for VMCI device (1023129)
The VMCI device is used for host-to-guest communications.
With VMware Fusion or Workstation, click Virtual Machine (VM) > Install VMware Tools. With ESXi run the vSphere Client and click Inventory > Virtual Machine > Guest > Install/Upgrade VMware Tools. Follow the on-screen instructions displayed during the VMware Tools installation. The VMCI driver is installed by any option you select during installation, such as Typical, Complete, or Custom. The Install VMware Tools menu item may be grayed out while downloading and installing, or if no network connection is found.
After installing VMware Tools, open the Device Manager to verify that the yellow warning has disappeared, and that the VMware VMCI Bus Device appears under the System Devices section of Device Manager.
Virtual hardware version 7 virtual machines have the VMware VMCI Bus Device enabled by default, but the device driver is not pre-installed; it is obtainable only through the VMware Tools installer. The VMCI device cannot be removed from virtual hardware version 7 virtual machines.
For Windows 98 and Windows 98SE, there is no support for the VMCI device in VMware Tools. One workaround is to disable the VMCI device using the Device Manager so that it is ignored by Windows, and diagnostic tools stop reporting errors. Another workaround is to downgrade the virtual machine to virtual hardware version 4.
Windows 8 and Windows Server 2012 are supported with VMware Tools in Workstation 9.x, Workstation 10.x, Fusion 5.x, Fusion 6.x, and ESXi 5.1.
The yellow warning could appear for reasons other than the lack of a VMware Tools driver. The dialog box for the device might show a numeric code, which you can check against the list of error codes in Microsoft Knowledge Base article 310123.
In some cases, uninstalling the device with the Device Manager and performing a scan for new hardware resolves the issue, as suggested under error Code 19.
For more information about VMware Tools, see Overview of VMware Tools (340).
For information about VMCI programming, see the VMCI Sockets Documentation.
Note: The preceding links were correct as of September 5, 2013. If you find a link is broken, please provide feedback and a VMware employee will update the link.
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