Error Code 0xc0000221 — Windows 11

Postup řešení

1. 1 Boot into Safe Mode: Restart and press F8 (or Shift + F8) before Windows loads. If Safe Mode works, you can try to identify the problematic driver. Press Windows key + X, select 'Device Manager', and look for devices with yellow exclamation marks. Right-click and choose 'Update driver' or 'Uninstall device' to remove the problematic driver.
2. 2 If Safe Mode doesn't work, use Windows Recovery Environment (WinRE) to run Startup Repair. Boot from installation media, click 'Repair your computer', then 'Troubleshoot' > 'Advanced options' > 'Startup Repair'. This can fix corrupted system files.
3. 3 Open Command Prompt from WinRE and run 'sfc /scannow' and 'DISM /Online /Cleanup-Image /RestoreHealth' to repair system files. These commands replace corrupted files with healthy ones.
4. 4 If the error mentions a specific file (e.g., a .sys file), you can try to replace it manually. In Command Prompt, type 'cd C:\Windows\System32\drivers' and press Enter. Then use 'ren filename.sys filename.sys.old' to rename the corrupted file. Then copy a backup from the installation media if available, or use the 'expand' command to extract from the Windows installation media.
5. 5 Check for malware: Run a full antivirus scan using Windows Defender Offline. From WinRE, go to 'Troubleshoot' > 'Advanced options' > 'Windows Defender Offline' and follow the prompts.
6. 6 If the issue persists, perform a system restore: From WinRE, go to 'Troubleshoot' > 'Advanced options' > 'System Restore' and choose a restore point before the error started.
7. 7 As a last resort, reset Windows: 'Troubleshoot' > 'Reset this PC'.