Hi
I think that your BIOS might have been corrupted when you ran the update. Did you use @BIOS for the task ?
Try doing this to get back to your old BIOS.
To restore the Main BIOS by flashing from the Backup BIOS you simply follow these steps but be aware timing is crucial so it may take a few attempts.
You can kick in the backup BIOS by shutting down the PSU from the wall, then hold down your case power button in and then turn on the power supply button, a few seconds later the board will start, shut off the power supply then. Then you can turn on the power supply again and power up the board normally and DualBIOS will kick in.
If you still have problems then :
Boot from the second BIOS, if you can't boot to windows on the main one, then ALT+F10 on startup from the second BIOS on a reboot from windows, this will reflash the MAIN BIOS with the backup BIOS you'd be booting from.