Sometimes, when you are installing a BIOS update, the updated BIOS has a difference in the mapping of BIOS Setup parameters from that of the previous BIOS. As a result, the affected parameters have to be reset during the installation process. This likely means that some parameter is not as you previously configured it and this is causing the boot process to fail. The likely culprit, from your description, is the Boot Order. Here are my suggestions for what to do about this:
- In the Boot parameters, make sure that Network (PXE) Boot is disabled.
- In the Boot parameters, make sure your boot disk is the first one in the Boot Order.
A good practice after updating the BIOS is to manually reset all parameters to their defaults (using the F9 process) and then customize only those parameters that are necessary for your particular hardware configuration. I always do this.
Hope this helps,