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  1. #1
    ROG Enthusiast Array
    Join Date
    Apr 2016

    G703GXR unbootable after 309 bios update from windows update

    Windows update pushed the latest bios to my laptop last evening, the 309. Right after that, the laptop is now unbootable, all attempts give me the "unmountable boot volume" BSOD. I had the OS installed on 4TB samsung evo 870 sata ssd.

  2. #2
    ROG Guru: Orange Belt Array rjbarker PC Specs
    rjbarker PC Specs
    MotherboardMaximus Z690 Apex BIOS 0811
    Processor12900K w EK Velocity 2
    Memory (part number)32 GB DDR5 - Dominator 5600 / Cl36
    Graphics Card #1Evga RTX 3080Ti FTW3 Ultra w EK Vector
    Sound CardOnboard USB Realtek
    MonitorDell Alienware 34" Ultra wide 120Hz Gsync
    Storage #1Samsung 980 Pro 512G M.2 NVMe
    Storage #2Samsung 980 Pro 1 TB M.2 NVMe
    CPU CoolerEK Velocity 2
    CaseCorsair 900D
    Power SupplyCorsair AX 1600i
    OS W11 HP x64 - 21H1
    Accessory #1 480 * 360 * 240 XSPC Radiators (15 Fans) w 4 Channel 200W Fan Controller
    Accessory #2 XSPC Photon Rez / Vario Pump combo
    Accessory #3 Fesser Flex Tubing - Bits Power Fittings & EK SLi Terminal
    rjbarker's Avatar
    Join Date
    May 2013

    If its anything like my older GL502 VY Asus Gaming laptop I had the exact same thing after I updated the BIOS.......googled it and found out that BIOS version was not compatible (somehow someway) with my Samsung 512G Pro Sammy SSD was a secondary drive (for games) not the Boot Drive (thats the original M.2 NVMe Drive that came with the PC.
    2 choices, either flash BIOS back to previous or replace the Sammy SSD.

    Swapped out the Sammy for a Seagate Barracuda SSD and all good, booted up right away.

  3. #3
    Moderator Array
    Join Date
    Feb 2019

    Hi there,
    Are you able to enter the starup repair or auto troubleshooting after 3 failing bootup?
    or have you try to enter BIOS and then reflash BIOS 309 again by EZ flash.
    Thank you.

  4. #4
    New ROGer Array
    Join Date
    Nov 2021

    have the same problem impossible to install windows 11 since the update of the 309.
    The installation freezes or I have a blue screen
    I changed the SSD hard drive, changed the ram, changed the SSD connection.
    I tested the same USB key on another Asus pc, no worries
    If I make too many installation attempts, the SSD hard drive is no longer recognized in the windows installer.
    But if I go to the BIOS (EFI) I can see the SSD
    After several attempts it works.
    But when I start a download on Steam after a while I have a blue screen
    But if I start a game no worries

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