Answer to "No Access to ACER ASPIRE V5 471 Bios (Operating System Not found)"Solved! 1. You will need a windows 8 8.1 or 10 Disk must be UEFI disk 2. Insert windows disk into DVD drive it should boot automatically if not then press F12 then acer logo appears. 3. Your computer now should boot into windows recovery chose to Boot into UEFI menu. 4. Now when you in UEFI menu you will be able to make any necessary BIOS changes then save and reboot your computer. 5. Now all should be working and windows Legacy mode supported.