Unable to Boot Virtual Appliance with Error "No Operating System Found"
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Unable to Boot Virtual Appliance with Error "No Operating System Found"


Article ID: 173659


Updated On:


Management Center SSL Visibility Appliance Software SV-VA Reporter-VA Content Analysis Software - CA CAS-VA Advanced Secure Gateway Software - ASG ProxySG Software - SGOS


After deploying your new virtual appliance in your vSphere environment and powering on the virtual machine you see the following message No operating system found

No operating system found


The following Symantec Network Protection virtual appliances require the boot mode be set to EFI:

  • SSLV-VA (SV-VA-*)
  • Reporter (RP-V*)
  • Management Center (MC-V*)
  • Content Analysis (CAS-VA-*)


The virtual appliances uses EFI/UEFI (Extensible Firmware Interface) as the boot loader if the boot option is set to BIOS the appliance will fail to boot as it does not support BIOS.


On the host we will need to modify the virtual machine settings and change the Boot Mode from BIOS to EFI. The below procedure is for modifying the boot option through vCenter Server using the vSphere client on version 6.5/6.7. If using a different version the procedure may vary and you will need to consult the appropriate VMWare documentation/support for further assistance.



  • Administrative rights to the Virtual machine to modify the boot options
  • Virtual machine is Powered Off 


  1. Browse to the virtual machine in the vSphere client
  2. Right-click the virtual machine and select the Edit Settings... option from the context-menu.
  3. In the modal window click the VM Options tab
  4. Expand the Boot Options tree
  5. Select EFI from the Firmware drop-down menu.
  6. Click OK to save changes
  7. Power on the virtual appliance.