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[Solved] Sony Vavio Error Code 0xc000000f Windows 8: A Required device isn’t connected or can’t be accessed & Black Screen

[Solved] Sony Vavio Error Code 0xc000000f Windows 8: A Required device isn’t connected or can’t be accessed & Black Screen:

I created a child account and then I restarted my Laptop but i was just seeing VAIO logo and after that a black screen with mouse courser.. But now it's fixed :D Follow the tutorial blew..

Strange Windows 8 blue screen error solved!Most modern laptops comes with Windows 8 pre-installed. Whenever you buy new laptops the manufactures have enabled some bios settings that may be compatible for Windows 8 only.Secure boot and Fast booting is one of such latest technologies that comes with all new laptops and PCs. The technology is called UEFI (Unified Extensible Firmware Interface) and it is a standard firmware interface for PCs, designed to replace BIOS (basic input/output system).
With EUFI enabled laptops you are unable to repair or re-install Windows.
In this article I’m gonna show you troubleshooting of windows 8 installation if EUFI boot enabled.
Before going to the technical description let me figure out my Windows 8 error.
I got a new laptop (Toshiba Satellite C850) with corrupted Windows 8 preinstalled. It was asking for repair, but when I try to boot from Windows DVD, it was not accepting.
Always shows a blue screen with the following error message.

Your PC needs to be repaired. 

Required device isn’t connected or can’t be accessed. 

Error code: 0xc000000f 

You’ll need to use the recovery tools on your installation media. If you don’t have any installation media (like a disk or USB device), contact your system administrator or PC manufacture. 

Press Enter to try again 

Press F8 for Startup Settings 
Press Esc for UEFI Firmware Settings 


Step 1: Press Power Button for like 10 seconds..Then press Assist Button on the top (instead of Power Button)

Step 2: Goto Bios as shown blow.

Step 3: Look for Security tab inside bios and navigate to Secure Boot. Then Enable it.

Step 4: Exit, Save Changes. Then .. Follow the image blow.


  1. I did that and it still returns to the same blue screen with the same error message

  2. Sanme case in sony viao pcg 71911m error code 0xcoooooof howcan solve the problem