To resolve “Operating System Not Found” error when you power ON the virtual machine that’s just created, you need to connect the device/ISO to the Virtual Machine.
Procedure to Solve Operating System not found error
- Select your Virtual Machine from inventory panel
- Right click -> Edit Settings -> Choose CD/DVD
- Under Device Status -> Select Connect at Power ON. You are done
- Then try to Power ON now and you should see the following OS installation screen instead of that error.