Fix Of Error Code Oxc000021a Occurring At The Time Of Installation Of Windows 10

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I purchased a new laptop with Windows 10 installed on it, but now it’s not starting but giving this ‘error code oxc000021a’. How can I fix this error code?

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Answered By 60 points N/A #321821

Fix Of Error Code Oxc000021a Occurring At The Time Of Installation Of Windows 10

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This error is generally caused because of some recent changes made by you on your laptop. Follow the steps mentioned below to fix this ‘error code oxc000021a’-

  • Boot from the Windows 10 DVD.
  • Select ‘Repair your computer.’
  • Click on ‘Troubleshoot.’
  • Now, select ‘Advanced Options.’
  • Click on ‘Safe Mode.’

Now check whether the error is gone. If still present, follow the steps given below-

  • Press Window key and R key together.
  • Type ‘MSCONFIG’ in run command box.
  • Select ‘Boot’ and uncheck ‘Safe Boot.’
  • Now, select ‘Selective startup’ on the ‘General’ tab.
  • Clear the Load startup items checkbox.
  • Select ‘Hide all Microsoft services’ checkbox on the ‘Services’ tab.
  • Click ‘Open task manager’ on the ‘Startup’ tab.
  • Now select each item that is enabled and select ‘Disable.’
  • Select ‘OK.’
  • Now, again type ‘MSCONFIG’ in run command box.
  • Select the Service tab and select the Hide all Microsoft services checkbox.
  • Select half checkboxes.
  • Now, click on ‘OK.’
  • Restart your PC.

Check that either error is still present or gone. Now select the remaining checkboxes and again restart your PC.

Answered By 587970 points N/A #324183

Fix Of Error Code Oxc000021a Occurring At The Time Of Installation Of Windows 10

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If you are using Windows 10, you may receive error code “0xc000021a” which causes a blue screen error or the BSOD. This error is normally caused by one of these two files: winlogon.exe and csrss.exe. The “winlogon.exe” program or service manages the logon and log off process on Microsoft Windows 10. The “csrss.exe” file is a core operating system file that handles the graphical instruction in the operating system.

If you receive this error, it is possible that one of these files is corrupt, deleted, or has been replaced by 3rd party software. To fix the problem, insert your Windows 10 setup DVD on your optical drive then restart the computer and boot to your DVD. Go to “Troubleshoot”, “Advanced options”, then select “Command Prompt”.

In the command prompt, type without quotes “chkdsk c: /f /r” then hit Enter. If this doesn’t work, repeat the same steps to go to “Advanced options” then select “Startup Repair”. This will scan your computer and fixes any startup-related issue. When repair is finished, remove the Windows 10 DVD then restart the computer.

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