This troubleshooting guide has been created for users experiencing a "Operating System Not Found" error message when booting the SimpleRisk VM appliance. This issue is generally caused by use of different VMWare products than the one the appliance was created with. To resolve the issue we will need to change the boot device priority. There are multiple ways to do this depending on what VMWare produce is in use.

How do I know if I'm affected?

Users affected by this issue will receive an error when booting the VM that will state "Operating System Not Found".

How do I resolve this issue?

This issue will be resolved by selecting the virtual HDD as the boot priority from the settings for the VM. 

1. Power on the VM and hold down the appropriate key to bring up the BIOS setup screen (usually F1 or F2). 


Note: You can force the power-on sequence to stop on the BIOS screen, as follows: 

   -   In vSphere Client or Web Client, right-click the VM and click Edit Settings > VM Options (or Options) tab > Boot Options. 

   - In vSphere Client, select Force EFI Setup. In vSphere Web Client, select The next time the virtual machine boots, force entry into the BIOS setup screen. 

   - Click OK. 

   - Power on the VM.  


2. Select Configure boot options > Change boot order. 


3. Set the boot options to use the HDD first.  


4. Exit the VM BIOS and save changes. 


The VM should continue booting. 

These instructions cannot cover all versions of all VMWare products if you are unable to locate specific instructions for your VMWare product please contact us via e-mail at and we will attempt to help you through the process.