Tested on 8 Feb 2024 on Acer Aspire V5-431. I can confirm that this work. My step is as following; 1) Create 1 Bootable windows 7 usb with BIO/MBR support, and install with it. 2) Download, extract, and run VA410218.exe that download from Acer support. 3) It will reboot and continue to flash and wait for the flash complete. However if someone with bad battery , you will encounter error not enough battery life; You can refer to this video. https://youtu.be/xIYLDJ2sGhE?si=Epf6r7f8...