I'm having dual boot. Everytime I update my BIOS, things are becoming more worse. Now, after update, every bootentry has been removed. I cannot add new entries. I tried many times. I think it's about the new bios update. I'm currently using hp laptop 352-TU. And running F.22 BIOS. I want to go back to F.19. But I cannot find that BIOS download for my laptop. Where can I download it from? Is there any problem if I downgrade bios version?
Many HP computers have an HP BIOS Restore tool that might be able to recover the BIOS from an earlier version and restore basic functionality. This tool might or might not work in the event of BIOS corruption depending on many factors, but is worth trying in the event the BIOS is corrupted.
Turn off the computer, and then connect the power cord.
Press and hold the Windows key and the B key at the same time, and then press and hold the Power button for 2 to 3 seconds.
Release the Power button but continue pressing the Windows and B keys. You might hear a series of beeps.
If the HP BIOS Update screen does not display, repeat the previous steps but press the Windows key and the V key. If the screen still does not display, your computer might not support the feature or there is a hard drive issue. Continue to the next section to Recover the BIOS using a USB recovery drive.
If the Power light turns off, the Power button was held too long. Repeat the previous steps, making sure to hold the Power button for only 2 to 3 seconds.
The HP BIOS Update screen displays and the recovery begins automatically.
If this recovery method fails, use another working computer to create a BIOS recovery flash drive to install the latest BIOS file.
If you are unable to recover the last working BIOS version, install a BIOS recovery file from the HP website using a USB flash drive. Use a second working computer with an active internet connection to create a BIOS recovery USB flash drive.
Get the product number for the original notebook that requires a BIOS recovery. This number is typically found on a label on the bottom of the notebook or on the box it shipped in. Go to How Do I Find My Model Number or Product Number? for additional options.
NOTE: The general or series name near the keyboard or on the frame around the display is not specific enough for identifying correct download files.
Insert a blank USB flash drive into an available port on the second computer.