Solved OS won't boot on Dell Inspiron 3520

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KingIsaiahIV

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hello, on my teacher's laptop, the OS which is Windows 8.1 won't start. It says "Please select proper boot device". But when I select "UEFI: Windows Boot Loader" on Boot menu when pressing f12 and it boots. but when I didn't select on boot menu it just shows the error. Please help.
Thanks in advanced
 

My Computer

System One

  • OS
    Windows 8.1 Pro with Media Center x64
    Computer type
    Laptop
    System Manufacturer/Model
    Self Built
    CPU
    Intel Core i7-5820K Haswell-E 6Core 3.3Ghz
    Motherboard
    ASUS P8B75-M LGA 1115
    Memory
    16GB DDR3
    Graphics Card(s)
    Sapphire Radeon VAPOR-X R9
    Sound Card
    SoundBlaster Z
    Monitor(s) Displays
    HP Pavillon 27xi
    Screen Resolution
    1920x1080
    Hard Drives
    Seagate 3TB Desktop HDD SATA 6Gb/s 64MB Cache 3.5-Inch Internal Bare Drive (ST3000DM001)
    PSU
    EVGA 500W 80PLUS Certified ATX12V/EPS12V Power Supply 100-W1-0500-KR
    Case
    Sentey Bx1-4237 Plus Gaming
    Keyboard
    Logitech Wireless Keyboard K360
    Mouse
    Logitech Wireless Mouse M325 with Designed-For-Web Scrolling
    Internet Speed
    10MB/ps Download , 2MB/ps Upload
    Browser
    Google Chrome, IE 11
    Antivirus
    Windows Defender
Get yourself a Windows 8.1 installation disc or USB flash drive.

Boot with that, and use the recovery options to repair the ESP.


If you need help, let me know.
 

My Computer

System One

  • OS
    Kernel 4.x
    Computer type
    PC/Desktop
    CPU
    i5 3570K
    Motherboard
    P8Z77-V LK
    Memory
    G.skill Ripjaw Z 2133MHz 9-11-10-28
    Graphics Card(s)
    GTX770 4GB Dual BIOS
    Sound Card
    Audigy 4 Pro
    Monitor(s) Displays
    32" SAMSUNG HDTV
    Screen Resolution
    1920x1080 progressive
    Hard Drives
    10TB total
    3 RAID arrays
    3 single disks
    PSU
    Corsair HX750
    Case
    Corsair R400
    Cooling
    Corsair H100
    Keyboard
    Logitech G510
    Mouse
    Logitech G5
    Internet Speed
    ~900mbps (~115MB/s) down, ~10mbps(~1.5MB/s) up
    Browser
    Firefox & Chromium
    Antivirus
    Common Sense
Thank you for your reply. But I've just reinstalled the OS and the problem still exists; and I've noticed that the settings in BIOS was never saved. Secure-Boot disables when turning off the PC and resets the Legacy mode.
 

My Computer

System One

  • OS
    Windows 8.1 Pro with Media Center x64
    Computer type
    Laptop
    System Manufacturer/Model
    Self Built
    CPU
    Intel Core i7-5820K Haswell-E 6Core 3.3Ghz
    Motherboard
    ASUS P8B75-M LGA 1115
    Memory
    16GB DDR3
    Graphics Card(s)
    Sapphire Radeon VAPOR-X R9
    Sound Card
    SoundBlaster Z
    Monitor(s) Displays
    HP Pavillon 27xi
    Screen Resolution
    1920x1080
    Hard Drives
    Seagate 3TB Desktop HDD SATA 6Gb/s 64MB Cache 3.5-Inch Internal Bare Drive (ST3000DM001)
    PSU
    EVGA 500W 80PLUS Certified ATX12V/EPS12V Power Supply 100-W1-0500-KR
    Case
    Sentey Bx1-4237 Plus Gaming
    Keyboard
    Logitech Wireless Keyboard K360
    Mouse
    Logitech Wireless Mouse M325 with Designed-For-Web Scrolling
    Internet Speed
    10MB/ps Download , 2MB/ps Upload
    Browser
    Google Chrome, IE 11
    Antivirus
    Windows Defender
I misunderstood your question, my apologies.

Let me ask a few questions to be sure I understand correctly.

Windows is currently installed as UEFI or Legacy?

When you change BIOS settings, and save then exit (F10). They automatically revert back to the old settings reboot?
 

My Computer

System One

  • OS
    Kernel 4.x
    Computer type
    PC/Desktop
    CPU
    i5 3570K
    Motherboard
    P8Z77-V LK
    Memory
    G.skill Ripjaw Z 2133MHz 9-11-10-28
    Graphics Card(s)
    GTX770 4GB Dual BIOS
    Sound Card
    Audigy 4 Pro
    Monitor(s) Displays
    32" SAMSUNG HDTV
    Screen Resolution
    1920x1080 progressive
    Hard Drives
    10TB total
    3 RAID arrays
    3 single disks
    PSU
    Corsair HX750
    Case
    Corsair R400
    Cooling
    Corsair H100
    Keyboard
    Logitech G510
    Mouse
    Logitech G5
    Internet Speed
    ~900mbps (~115MB/s) down, ~10mbps(~1.5MB/s) up
    Browser
    Firefox & Chromium
    Antivirus
    Common Sense
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