Windows 8.1 pro "0xC000021A" error at boot

toketog

New Member
Messages
4
hello everybody, suddenly today when i tried to boot my pc pc i faced the "0xC000021A" error. I have tried a lot of things such as safe mode, windows auto repair and "bootrec /fixmbr" & "bootrec /fixboot" commands but nothing worked...I am desperate... Thanks in advance for your help :)
 

My Computer

System One

  • OS
    Windows 8.1 Pro
    Computer type
    PC/Desktop

My Computer

System One

  • OS
    Windows 8.0 x64
    Computer type
    Laptop
    System Manufacturer/Model
    Toshiba Satelite C55D-A Laptop
    CPU
    AMD EI 1200
    Memory
    4 gb DDR3
    Graphics Card(s)
    Raedon 340 MB dedicated Ram
    Monitor(s) Displays
    Built in
    Screen Resolution
    1366 x 768
    Hard Drives
    640 GB (spinner) Sata II
    Keyboard
    Built in
    Mouse
    Touch pad
I have also tried it with no result....:(

How about listing what you tried already to avoid useless suggestions? It might save time.
 

My Computer

System One

  • OS
    Windows 8.0 x64
    Computer type
    Laptop
    System Manufacturer/Model
    Toshiba Satelite C55D-A Laptop
    CPU
    AMD EI 1200
    Memory
    4 gb DDR3
    Graphics Card(s)
    Raedon 340 MB dedicated Ram
    Monitor(s) Displays
    Built in
    Screen Resolution
    1366 x 768
    Hard Drives
    640 GB (spinner) Sata II
    Keyboard
    Built in
    Mouse
    Touch pad
Are you able to get into Windows? If so, Please provide this information so we can provide a complete analysis (from the Pinned Topic at the top of the forum): http://www.eightforums.com/bsod-cra...e-screen-death-bsod-posting-instructions.html

Are you able to boot to Startup Repair? If so, what are the results when you try it?
Are you able to boot to the diagnostics for Win8 (Refresh/Reset/etc)? If so, what are the results when you try it?

Do you have a bootable repair/installation disk that you can use to access Startup Repair? If so, what are the results when you try it?
 

My Computer

System One

  • OS
    Win8.1Pro - Finally!!!
    Computer type
    Laptop
    System Manufacturer/Model
    Samsung/NP780
    CPU
    Came with the laptop (i7 of some sort)
    Motherboard
    Pretty sure that it has one, but haven't checked inside the case!
    Memory
    upgraded to 12 gB from 8 gB
    Graphics Card(s)
    has switchable - Intel/ATI - Used wrong drivers, now ATI card is inop :( Will have to fix it soon!
    Sound Card
    I'm nearly deaf, so this isn't used often
    Monitor(s) Displays
    Touchscreen on laptop/32" Toshiba on HDMI (laid the Sharp TV on a mouse and cracked the screen!)
    Screen Resolution
    800x600
    Hard Drives
    One Samsung 1tB drive - 5400 rpm. Gonna switch to a 7200/10000 rpm or an SSD (if I can find $500 for a 1tB SSD!)
    - Switched to 500 gB Samsung 840 series SSD - WOW!!!
    PSU
    Why do we ask this for laptops?
    Case
    Silver with a neat Samsung logo
    Cooling
    sub-par, gotta get around to working on it soon Worked on it - still sub-par! :(
    Keyboard
    Microsoft Natural - the same one I've used since it orignally came out around 1995
    Mouse
    no Mouse - Trackball!!!!
    Internet Speed
    too slow when I'm waiting for a download to finish
    Browser
    Yes, I use this (Firefox mostly, w/IE next most)
    Antivirus
    Windows Defender and Windows Firewall
    Other Info
    I'm handsome and a snappy dresser :0)
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