Solved Unable to boot Dell laptop into boot menu


Mark Phelps

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OS
Windows 11
Running Win11 24H2 Bld 26100.6584 on Dell laptop - but unable to boot into Boot menu. Laptop has multifunction keys, so have to press the Fn key + function key.

I restart, holding down the Fn key, pressing F12 repeatedly but nothing happens.

I'm trying to remove a MountUUP directory from a failed UUPDUMP run, so I need to boot into a USB stick -- but I can't get the Dell menu to show up.
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom built
    CPU
    Ryzen 5600X
    Motherboard
    ASRock Steel Legend
    Memory
    16GB
    Graphics Card(s)
    EVGA GT 710
    Sound Card
    None
    Monitor(s) Displays
    23",24", 19" - flat panels
    Screen Resolution
    1920x1200
    Hard Drives
    None - only M.2 SATA and NVMe drives
    PSU
    750W
    Case
    Antec
    Cooling
    stock Wraith cooler
    Keyboard
    Corsair gaming
    Mouse
    Logitech M720
    Internet Speed
    1Gb
Try just the F12 key without the Fn key.
 

My Computers

System One System Two

  • OS
    Windows 11 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Tower Plus EBT2250
    CPU
    Intel Core Ultra 7 265
    Memory
    32GB
    Graphics Card(s)
    NVIDIA GeForce RTX 3050 6GB
    Monitor(s) Displays
    2x Dell U2419H
    Hard Drives
    NVMe Phison 521GB SSD
    Seagate 2TB HDD
    (Dell installed them RAID enabled using Intel VMD)
  • Operating System
    Windows 11 25H2
    Computer type
    Laptop
    Manufacturer/Model
    HP
    CPU
    Intel Core i5-1334U
    Motherboard
    HP 8DD7 - Intel Alder Lake-P PCH
    Memory
    8 GB
    Graphics card(s)
    Intel Raptor Lake-U - Integrated Graphics
    Hard Drives
    512 GB
You could also try the Settings > System > Recovery > Advanced startup route to get to boot from a USB drive.
 

My Computers

System One System Two

  • OS
    Windows 11 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Tower Plus EBT2250
    CPU
    Intel Core Ultra 7 265
    Memory
    32GB
    Graphics Card(s)
    NVIDIA GeForce RTX 3050 6GB
    Monitor(s) Displays
    2x Dell U2419H
    Hard Drives
    NVMe Phison 521GB SSD
    Seagate 2TB HDD
    (Dell installed them RAID enabled using Intel VMD)
  • Operating System
    Windows 11 25H2
    Computer type
    Laptop
    Manufacturer/Model
    HP
    CPU
    Intel Core i5-1334U
    Motherboard
    HP 8DD7 - Intel Alder Lake-P PCH
    Memory
    8 GB
    Graphics card(s)
    Intel Raptor Lake-U - Integrated Graphics
    Hard Drives
    512 GB
Try just the F12 key without the Fn key.
If I just press the F12 key, that is the End function. I have to press the Fn key to get the F12 function.
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom built
    CPU
    Ryzen 5600X
    Motherboard
    ASRock Steel Legend
    Memory
    16GB
    Graphics Card(s)
    EVGA GT 710
    Sound Card
    None
    Monitor(s) Displays
    23",24", 19" - flat panels
    Screen Resolution
    1920x1200
    Hard Drives
    None - only M.2 SATA and NVMe drives
    PSU
    750W
    Case
    Antec
    Cooling
    stock Wraith cooler
    Keyboard
    Corsair gaming
    Mouse
    Logitech M720
    Internet Speed
    1Gb
If I just press the F12 key, that is the End function. I have to press the Fn key to get the F12 function.
On all our of Dell Laptops and the all the ones we sell the F12 key works without using the Fn key.
 

My Computer

System One

  • OS
    Windows 11 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell
    CPU
    12th Gen i9 -12900K
    Memory
    64GB
    Graphics Card(s)
    Intel UHD Graphics
    Monitor(s) Displays
    Dual Dell U2717D
    Screen Resolution
    2560x1440
    Hard Drives
    2TB Lexar SSD, 2TB Crucial SSD, 2TB Kingston SSD
If I just press the F12 key, that is the End function. I have to press the Fn key to get the F12 function.

Windows might regard F12 as End but, at the boot, you are not in Windows - the Bios is still in control.


All the best,
Denis
 

My Computer

System One

  • OS
    Windows 11 Home x64 Version 25H2 Build 26200.8037

Have you tried the above?
 

My Computers

System One System Two

  • OS
    Windows11 Pro 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Alienware Aurora R16
    CPU
    Intel Core i9 14900F (24 -Core, 68 MB Total Cache)
    Motherboard
    Dell Alienware
    Memory
    32GB DDR5
    Graphics Card(s)
    RTX 4080 Super w/581.95
    Sound Card
    Realtec
    Monitor(s) Displays
    Corsair XENEON 32QHD165
    Screen Resolution
    2560 X 1440
    Hard Drives
    1-2TB Samsung 990 Pro PCIe NVMe M2 SSD
    1-4TB Samsung 990 Pro PCIe NVMe M2 SSD
    PSU
    1000 Watt Platinum Dell
    Case
    Alienware
    Cooling
    Liquid Closed Loop
    Keyboard
    Logitech MK270 Wireless Keyboard
    Mouse
    Logitech MK270 Wireless
    Internet Speed
    100Gb's Down-20 Up
    Browser
    Firefox 151.0.2
    Antivirus
    Defender
    Other Info
    Very Quiet And Fast
    CyberPower UPS CP1500PFCLCD
  • Operating System
    PClinuxOS Mate (2025.7)
    Computer type
    PC/Desktop
    Manufacturer/Model
    Intel
    CPU
    13th Gen Inter(R) Core(TM) i3-1315U
    Motherboard
    Intel
    Memory
    64 GB DDR4 @3200 MHz.
    Graphics card(s)
    Internal
    Sound Card
    None
    Monitor(s) Displays
    Dell 2419HGCF
    Screen Resolution
    1920 X 1080
    Hard Drives
    SAMSUNG 980 PRO SSD 2TB, PCIe 4.0 M.2 2280
    PSU
    Chicony 30 Watt
    Case
    Small
    Keyboard
    Dell
    Mouse
    Razor
    Internet Speed
    1GB
    Browser
    Slimjet
If I just press the F12 key, that is the End function. I have to press the Fn key to get the F12 function.
When in the BIOS before Windows loads the Fn key is not needed. Just press F12 on its own.
 

My Computers

System One System Two

  • OS
    Windows 11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Acer Aspire 3 A315-23-R9VY
    CPU
    AMD Athlon Silver 3050U
    Memory
    8GB
    Graphics Card(s)
    Radeon Graphics
    Monitor(s) Displays
    laptop screen
    Screen Resolution
    1366x768 native resolution, up to 2560x1440 with Radeon Virtual Super Resolution
    Hard Drives
    1TB Samsung EVO 870 SSD (from April 2026: 250GB EVO 850)
    Internet Speed
    150 Mbps
    Browser
    Edge, Firefox
    Antivirus
    Defender
    Other Info
    fully 'Windows 11 ready' laptop. Windows 10 C: partition migrated from my old unsupported 'main machine' then upgraded to 11. A test migration ran Insider builds for 2 months. When 11 was released on 5th October 2021 it was re-imaged back to 10 and was offered the upgrade in Windows Update on 20th October. Windows Update offered the 22H2 Feature Update on 20th September 2022. It got the 23H2 Feature Update on 4th November 2023 through Windows Update, 24H2 on 3rd October 2024 through Windows Update by setting the Target Release Version for 24H2, and 25H2 on 30th September 2025 through Windows Update by setting the Target Release Version for 25H2.

    UPDATE - 11 April 2026: due to mechanical deterioration this PC has been retired from active duty. The OS with all software and files has been migrated to my System Seven below to carry on as my general purpose 'main machine'.

    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB NVMe ssd, supported device running Windows 11 Pro.

    My SYSTEM FOUR is a 2-in-1 convertible Lenovo Yoga 11e 20DA, Celeron N2930, 8GB RAM, 256GB ssd. Unsupported device: currently running Win10 Pro, plus Win11 Pro RTM and Insider Dev, Beta, and RP 24H2 as native boot vhdx.

    My SYSTEM FIVE is a Dell Latitude 3190 2-in-1, Pentium Silver N5030, 8GB RAM, 1TB NVMe ssd, supported device running Windows 11 Pro, plus Insider Beta, Dev, and Canary builds (and a few others) as a native boot .vhdx.

    My SYSTEM SIX is a Dell Latitude 5550, Core Ultra 7 165H, 64GB RAM, 1TB NVMe SSD, supported device, Windows 11 Pro 24H2, Hyper-V host machine. Updated to 25H2 on 30th September 2025.

    My SYSTEM SEVEN is a Lenovo Thinkpad T580, Intel Core i7-8650U, 16GB RAM, 512GB NVMe SSD + 2nd 512GB NVMe SSD, a supported device for Windows 11. This is my current general purpose 'main machine'. The installed Windows 11 Home from my System One has been migrated to this machine.
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Dell Latitude E4310
    CPU
    Intel® Core™ i5-520M
    Motherboard
    0T6M8G
    Memory
    8GB
    Graphics card(s)
    (integrated graphics) Intel HD Graphics
    Screen Resolution
    1366x768
    Hard Drives
    500GB Crucial MX500 SSD
    Browser
    Firefox, Edge
    Antivirus
    Defender
    Other Info
    unsupported machine: Legacy bios, MBR, TPM 1.2, upgraded from W10 to W11 using W10/W11 hybrid install media workaround. In-place upgrade to 22H2 using ISO and a workaround. Feature Update to 23H2 by manually installing the Enablement Package. In-place upgrade to 24H2 using hybrid 23H2/24H2 install media. Upgraded to 25H2 by Enablement Package. Also running Insider Dev, and Canary builds and Windows 10 as native boot .vhdx.

    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB NVMe ssd, supported device running Windows 11 Pro.

    My SYSTEM FOUR is a 2-in-1 convertible Lenovo Yoga 11e 20DA, Celeron N2930, 8GB RAM, 256GB ssd. Unsupported device: currently running Win10 Pro, plus Win11 Pro RTM and Insider Dev, Beta, and RP 24H2 as native boot vhdx.

    My SYSTEM FIVE is a Dell Latitude 3190 2-in-1, Pentium Silver N5030, 8GB RAM, 1TB NVMe ssd, supported device running Windows 11 Pro, plus Insider Beta, Dev, and Canary builds (and a few others) as a native boot .vhdx.

    My SYSTEM SIX is a Dell Latitude 5550, Core Ultra 7 165H, 64GB RAM, 1TB NVMe SSD, supported device, Windows 11 Pro 24H2, Hyper-V host machine. Updated to 25H2 on 30th September 2025.

    My SYSTEM SEVEN is a Lenovo Thinkpad T580, Intel Core i7-8650U, 16GB RAM, 512GB NVMe SSD + 2nd 512GB NVMe SSD, a supported device for Windows 11. This is my current general purpose 'main machine'. The installed Windows 11 Home from my System One has been migrated to this machine.
On my Dell Laptop, F2 gets you into BIOS setup and F10 loads the boot menu. No FN key necessary.
 

My Computer

System One

  • OS
    Windows 11 22H2 Pro (X-lite Micro 11 version)
    Computer type
    Laptop
    Manufacturer/Model
    Dell/ Precision 7680
    CPU
    i7 13850HX (20 cores, 28 threads)
    Motherboard
    Dell
    Memory
    32GB DDR5
    Graphics Card(s)
    Intel UHD/ RTX 1000 ADA
    Sound Card
    Realtek
    Monitor(s) Displays
    4K UHD Touchscreen
    Screen Resolution
    3840 x 2400
    Hard Drives
    Samsung 512GB system drive
    WD Blue 1TB game drive
    PSU
    240W AC adapter, 1800W when docked
    Internet Speed
    1 gigabit symmetrical
    Browser
    Firefox, Librewolf
    Antivirus
    None. Manully configured so nobody except me can change any critical system files. (Don't ask how, it's probably against some rule somewhere)
Thanks to everyone for the help.

Pressing F12 on boot DOES work -- surprised me.

Also, the Add UEFI Menu works.

So now, I have two ways to get into the UEFI menu.
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom built
    CPU
    Ryzen 5600X
    Motherboard
    ASRock Steel Legend
    Memory
    16GB
    Graphics Card(s)
    EVGA GT 710
    Sound Card
    None
    Monitor(s) Displays
    23",24", 19" - flat panels
    Screen Resolution
    1920x1200
    Hard Drives
    None - only M.2 SATA and NVMe drives
    PSU
    750W
    Case
    Antec
    Cooling
    stock Wraith cooler
    Keyboard
    Corsair gaming
    Mouse
    Logitech M720
    Internet Speed
    1Gb

My Computer

System One

  • OS
    Win 7,8.1,10,11, Mint, Kde Plasma, Debian
    Computer type
    Laptop
    Manufacturer/Model
    Dell
    CPU
    Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz
    Memory
    16 GB
    Graphics Card(s)
    Intel(R) HD Graphics 520/Nvidia GeForce 930M
    Sound Card
    Intel(R) Display Audio/RealtekAudio
    Monitor(s) Displays
    Generic Pnp Monitor
    Screen Resolution
    1366 X 768
    Hard Drives
    ST2000LM024-1EJ164
    Keyboard
    Eng (US)
    Mouse
    Sanwa Supply
    Browser
    Firefox
    Antivirus
    Avast One
    Other Info
    Too many laptops with different system specifications.
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