The utility will automatically restart your laptop. Before booting into Windows, a black screen with a progress bar will appear reading "InsydeH2O - Secure Flash" or "Updating System Firmware" . 5. Finalize the Boot
Before you begin, please be aware of several recent reports from the Acer community:
Before proceeding, it is important to understand that a BIOS update is not a routine software patch. If the process is interrupted—due to a power loss or system crash—your laptop may become "bricked" or unbootable. Only perform this update if you are experiencing specific technical issues or if the update notes mention a critical security patch or performance fix. Pre-Update Checklist update bios acer nitro 5 an51543 link
: Extract the downloaded .zip file and run the .exe application as an administrator. ⚠️ Critical Tips
To ensure the safety of your hardware, always download BIOS files directly from the manufacturer. Go to the official Acer Support website. Enter your Serial Number, SNID, or model number (AN515-43). Select your specific model from the dropdown list. The utility will automatically restart your laptop
Do not, under any circumstances, update the BIOS on battery power. Ensure your AC adapter is plugged in and the battery is charged, preferably to 100%.
Once there:
A Flash Firmware Tool window will open. It will show your current BIOS and the new BIOS version. Click "OK" or "Proceed".