If you are currently facing the “A required device isn’t connected or cannot be accessed” error with codes 0xc0000185, 0xc0000225, 0xc0000001, 0xc00000f, and 0xc000000e on your Windows 10 computer, worry not for this post will help you resolve this problem. All these error codes point out the same thing – your computer needs to be repaired. Some of these error codes are related to the “winload.efi” file which means that you are using the UEFI system. This file also loads up important drivers in order to start the Windows Kernel. And if you got a remark from any of these error codes indicating that there is a hardware failure or that the driver configuration is incorrect, then you must physically check if the wires are connected properly.
This kind of error occurs mostly when your computer wasn’t able to locate the system files that are needed to boot up your computer. Thus, the only way to fix this problem is to correct the boot record. It is recommended that you utilize the “/RebuildBCD” option in order to rebuild the BCD files. To do so, follow these steps:
On the other hand, if rebuilding the BCD using the /RebuildBCD option didn’t help, you can try a crude way to rebuild the boot record from scratch. You can do that by following the given steps below which will export and delete/backup the BCD available in the system.
If it still didn’t help, then troubleshoot the problem further with the help of the following instructions.
Disabling the Secure Boot in the BIOS settings is definitely recommended to resolve the error. To disable Secure Boot, here’s what you have to do:
You could also run a System File Checker or SFC scan. All you have to do is select Command Prompt from the Advanced Options. Once you’ve opened Command Prompt, type the “sfc /scannow” command and tap Enter to execute it.
In this option, you need to boot your computer into the Advanced Startup Options and from there, run the Automatic Startup Repair and then wait until the process is completed.
If updating the BIOS didn’t help in fixing the error, you can try to reset the BIOS instead.
You should also check the physical status of the hardware in your computer. You can clean the dust off the hardware components like the Network Card of the computer. You might want to use a small blower or you could also use a soft cloth and run the components gently. Make sure that you don’t damage any parts with moisture or cause harm to any circuits while you carry out this task.

From the menu choose Command Prompt (administrator)
When the command prompt is active type the next command in it:
DISM /online /export-driver /destination:C:\DriverBackup
where: C:\DriverBackup is the folder and the hard drive where you want to store your backed-up drivers.
Press ENTER
That's it, you have now successfully backed-up all of your installed Windows drivers.
Now, save all of your drivers on USB and reinstall Windows.
but this time choose Device manager
From decide, manager right-click on any device Windows has not been able to install appropriate driver and choose update driver
Error Causes“There were some problems installing updates, but we’ll try again later. If you keep seeing this and want to search the web or contact support for information, this may help – (0x80240438).”To resolve Error Code 0x80240438, here are some potential fixes you need to check out:
“This setting allows you to remove access to Windows Update. If you enable this setting, all Windows Update features are removed. This includes blocking access to the Windows Update Web site at http://windowsupdate.microsoft.com, from the Windows Update hyperlink on the Start menu, and also on the Tools menu in Internet Explorer. Windows automatic updating is also disabled; you will neither be notified about nor will you receive critical updates from Windows Update. This setting also prevents Device Manager from automatically installing driver updates from the Windows Update Web site.”If you enable this policy setting, you can configure one of the following notification options:
VSSControl: 2147467259 Backup jobs failed. Cannot create a shadow copy of the volumes containing the writer’s data. VSS asynchronous operation is not completed. Code: [0x8004231f]This message pops up when you are creating a snapshot system restore, usually, the issue is tied with insufficient space or service stopping. We will go into detail about how to fix both so you can finish the operation without any issue.
Once run dialog is shown type in it control panel as shown in the picture and press OK
If you have followed the steps precisely, you should be now in the control panel of Windows 10. Click on the top-right view and choose large icons. The Control panel will switch to a grid-like view, in the current view go to the far-right and almost bottom icon where it says User Accounts and click on it.
User account settings
Once you click on the link you will be presented with a User account control slider on the left and a brief explanation on the right
Here in the picture, we see Windows default setting and an explanation of when and how he will notify you. If you wish to turn all notifications linked to programs changing computer or you making windows changes, click on the left slider and bring it all the way to the bottom where it says never notify me. If you prefer some notifications try to find which of the remaining 3 settings best suit your needs. Once you are done and satisfied with your choice click on OK. Error Code 0x80070570 is a common Windows 10 error code that generally is seen by users who are attempting to install a new version of the operating system. While it is most often associated with Windows 10, variations on this same error code have been present in previous versions of the operating system, going all the way back to Windows 7.
Common symptoms include:
Error CausesIn some cases, Error Code 0x80070570 arises erroneously when the system isn’t able to find a particular file that it needs. Other times, it happens when there is a conflict with the antivirus software that you are running and the installation software. Finally, there may be a faulty source of RAM in your computer that needs to be removed before the installation can be completed.
Regardless of what you believe to be the cause behind the error code, there are at least two different methods that you can use to try to resolve Error Code 0x80070570 on your device. The first is fairly simple and easy to follow, while the second requires a little bit more knowledge of your hardware in order to complete it successfully.
There are two common ways that users can attempt to get around Error Code 0x80070570 on their devices. Each requires a little more skill and technical knowledge than the last. If you don’t feel like you have the skill, time, or ability to invest in the methods below, be sure to get in touch with a Windows repair technician who can help you to complete the necessary steps in the right ways.
Here are the best ways to attempt to resolve Error Code 0x80070570 on your Windows device:
In some cases, when Error Code 0x80070570 appears on your computer, you can simply click on the OK button and then go back to the screen immediately proceeding where your installation has left off, choosing to restart the process of installation. For some users, repeating this method at least four times has allowed them to bypass the error without undertaking more serious and time-consuming methods to resolve the issue at hand.
If you have more than one source of RAM in your computer, first remove one of the sources, then re-attempt installation. If you are still encountering Error Code 0x80070570 after removing one of the sources, continue to remove each until you are down to a single source, then trade that last source for one of the ones that have been pulled.
If you have a bad source of RAM, this can help you to figure out which input is causing the error to appear and to address the problem appropriately. Once you have determined which specific source is causing the problem, you can reboot your computer and attempt to run the installation process one more time.
If your RAM sources are not specifically causing the issue, you may still need to run diagnostics tests on your hardware to identify the source of the problem at hand.
If you wish to always have at your disposal a utility tool to fix these Windows 10 and other related issues when they do arise, download and install a powerful automated tool.
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Stop c000021a {Fatal System Error} The session manager initialization system process terminated unexpectedly with a status of 0xc0000017 (0x00000000, 0x0000000) The system has been shut down.