If you have or are currently getting a troublesome error saying, “The boot selection failed because a required device is inaccessible” when you boot your computer, then continue reading as this post will give you some suggestions that may help you resolve the error.
This pesky error pops up during the booting process of your computer and prevents you from booting to your Windows 10 PC and displays the error message on a black screen instead. To fix this problem, here are some suggestions you need to check out.
If you are now able to boot from your hard drive, you need to know which option to choose once the boot menu pulls up. Refer to the steps below to easily boot from your hard drive.
The DSKCHK utility scans your hard drive for any errors, bad files, or corrupt sectors so this should help in fixing the problem.
CHKDSK /R /X C:

Error Causes“Something went wrong You can contact Microsoft support for help with this error. Here is the error code 0xa0000400.”As you know, keeping your computer up to date with all the Windows Updates is important and is imperative especially if you are experiencing a couple of issues like the Windows Upgrade error 0xa0000400. At the time of writing, there is no specific cause that has been found for this error. However, there are some potential fixes that might help you. You can try to recreate the Windows 10 installation USB and get the ISO files or you could also get a newer version of the Windows Media Creation Tool, or turn off your internet connection at a specific time or run the Windows Update troubleshooter. For more details, refer to the options given below.
Error Causessfc/scannowWhen it is done, a message will confirm that Windows found some corrupt or missing files and it has successfully repaired those. Check the Outlook and see if your emails are sending. If the problem persists, don’t worry there is another way to solve this. Users have found another command helpful is using the NetShell utility from the command prompt, which is similar to the above solution.
netshwinsosk resetThis helpful command will reset the network adapter to its default settings. Hope this will solve your problem. If not, you may want to try the Method 2 listed below.