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How to Fix Windows 10 Error 0xc000021a This is a common BSOD error which occurs when WinLogon or (CSRSS) Client Server Runtime Subsystem are causing a BSOD or it could be Winlogon or CSRSS are corrupted. You can also get this error from a corrupt or failed Windows update. This error code 0xc000021a can also point towards Malware. The error will cause can continuous boot loop. I will show you things you can try to fix the error 0xc000021a. The 0xC000021A error can occur if or stops working. This happens if: * Corrupt operating system files. * There was a failed Windows upgrade. * Corrupt Windows Update * Incomplete installation of a software program. * Malware I hope these resolve your error. 1. First, try a system restore. 2. chk disk /f /r 3. sfc /scannow 4. dism/online/cleanup-image/restorehealth 5. dism /image:C:\ /cleanup-image /revertpendingactions 6. Disable Driver Signature Enforcement 7. Try booting to safemode with networking 8. Roll computer back to a previous version of
