“Acer Nitro 5 AN515-43. Same issue. Fixed by updating BIOS to v1.14. This laptop ships with buggy AGESA code for the Ryzen 5. Flashing the BIOS is risky, but it worked for me.”
Use this method if Windows is corrupted or if the executable fails to run. update bios acer nitro 5 an51543
Q: Can I update the BIOS using a Mac? A: No, the BIOS update utility is only compatible with Windows-based systems. “Acer Nitro 5 AN515-43
: Remove external mice, printers, and USB drives to prevent interference. This laptop ships with buggy AGESA code for the Ryzen 5
The Acer Nitro 5 AN515-43 seems to have a somewhat rocky history with BIOS updates. In an Acer Community discussion, one user reported that updating to made the laptop slow and prone to freezing, rendering it nearly unusable. Other users in the thread confirmed they had found similar complaints online, indicating a "known issue with the latest BIOSes for this model". Another user on Microsoft Q&A reported that updating to BIOS version 1.12 caused a huge increase in "Hardware Reserved Memory" (from 2.1GB to 4.6GB) and boot issues, noting the BIOS update doesn't fully support newer Windows builds.
After the laptop boots back into Windows, verify that the update was successful. Open msinfo32 (System Information) again.