Why PXIe-8881 Can’t Seem to Find the Windows OS After Windows Updating?

Issue Details

I need to perform Windows updates to support a third‑party application on my PXIe‑8881 controller.
After completing the update process and rebooting the system, I encounter the following screens.
 

Solution

1. Boot Option for Windows 10 reversed with the legacy boot option.
   To solve this issue, you can navigate in the BIOS menu by pressing Del. Navigate to the boot tab, move Windows Boot Manager as the first boot option.
    

2. Missing Windows Boot Manager boot option in BIOS.
   You can follow the steps to rebuild the Windows Boot Manager boot option.
   
   Step 1: Download the latest firmware update(PXIe-8881 Firmware and Additional Drivers) for the PXIe‑8881 and copy it to a USB flash drive.
   Step 2: The PXIe‑8881 contains memory backed up by a battery to store BIOS configuration information. 
   Complete the following steps to clear the CMOS contents:

   • Power off the chassis.
   • Remove the controller from the chassis.
   • Press the clear CMOS button (SW2) as shown in the following figure.
   • Reinstall the controller in the chassis.
      
    
   Step 3: Boot into the BIOS menu. At this point, you should be able to select Windows Boot Manager as Boot Option #1.
   Step 4: After entering Windows, open NI MAX, select the PXIe‑8881, and use the firmware file on the USB drive to perform the update. You can refer Update the PXI chassis firmware - NI for detailed steps.
   
   
   

Additional Information

The latest BIOS is included in the PXIe-8881 Firmware that you can update through NI MAX.