Struck at BIOS screen is the most common problem after BIOS update. Many people face this issue after BIOS update to 0099 version for the Intel DH61BE, DH61CR, DH61DL, DH61WW, DH61SA, DH61ZE series motherboards.
Recently I have faced the same type of problem but I have managed to solve it. My motherboard is Intel DH61SA classic series and my motherboard's BIOS version was 0048.
If your BIOS version is 0048 and you are trying to update it to latest 0120 version then first you have to update it to 0099 version and only then you can update it to latest BIOS version 0120. (As per Intel's BIOS Update release Notes)
I prefer F7 BIOS Flash Update. I downloaded the two BIOS update files from Intel's website namely be0099.bio and be0120.bio files. I used a FAT32 formatted pendrive for this purpose. I copied the be0099.bio and be0099.bio files in the pendrive. File be0099.bio is used to update the BIOS to version 0099 and be120.bio is used to update the BIOS to version 0120.
First connect your pendrive to a USB port and restart the computer. In the BIOS start-up screen, select BIOS update option by pressing F7 and then select the pendrive and then choose be0099.bio file for BIOS update. After successful BIOS update restart your computer and in my case, my computer struck at BIOS screen after restart. Only BIOS settings was accessible but my computer was not booting into operating system.
What you have to do now is to restart your computer again and from the BIOS screen press F7 for BIOS update. Then select your pendrive and choose the latest be0120.bio file for another update. There might be two cases:
1. Successful BIOS update and booting computer into Operating System.
or 2. Failed BIOS update and erroneous BIOS.
In my case, it was the 2nd case.
What you should do for the 2nd case? Answer: Just shut down your computer and unplug power cable. Then open your computer case and find the 3 pin jumper on your motherboard. Remove the jumper and then power on your computer (your pendrive must be connected to the USB port). An automatic BIOS recovery will start and wait till it completes.
Then shut down your computer and remove the pendrive. Then put the jumper back to it's original location on your motherboard. After that restart your computer.
And then finally, I have repaired my BIOS and my computer booted into OS.