Error Code 0xc0000221 on Windows 11 usually appears during system startup and prevents Windows from booting properly. The error is often displayed on a blue or black screen with a message indicating that Windows failed to load because a required system file is missing or corrupted.
This issue can occur after a Windows update, an unexpected shutdown, disk errors, or system file corruption. Since the error blocks access to Windows, it must be resolved using recovery and repair tools.
Below are the most effective solutions to fix Error Code 0xc0000221 on Windows 11.
Why You Should Fix Error Code 0xc0000221 Immediately
Error code 0xc0000221 indicates that Windows cannot verify or load essential system files required for startup. When this happens, Windows enters a recovery loop or fails to boot entirely.
If the issue is not resolved, you may lose access to your system, experience repeated boot failures, or face permanent system corruption. Fixing the error restores boot functionality and prevents further damage to Windows system files.
Fix Error Code 0xc0000221 on Windows 11
Follow the fixes below in order, starting with basic recovery options and moving toward advanced solutions.
1. Restart Your PC and Enter Automatic Repair
In some cases, the error is caused by a temporary boot issue. Restarting the system can trigger Automatic Repair, which may fix the problem automatically.
Restart your PC two to three times while Windows is loading. If Windows detects repeated startup failures, it will enter Windows Recovery Environment (WinRE) automatically.
If Automatic Repair does not resolve the issue, proceed to the next fix.
2. Run Startup Repair from Windows Recovery
Startup Repair scans Windows boot files and attempts to fix issues preventing Windows from starting.
- Enter Windows Recovery Environment
- Select Troubleshoot
- Click Advanced options
- Choose Startup Repair
- Select your Windows account and enter the password if prompted
Allow Windows to complete the repair process and restart your PC.
3. Run System File Checker Using Command Prompt
Corrupted or missing system files are a common reason for error code 0xc0000221. Running SFC from recovery mode can repair these files.
- In Advanced options, select Command Prompt
- Enter the command below and press Enter:
sfc /scannow /offbootdir=C:\ /offwindir=C:\Windows - Wait for the scan to complete
- Restart your PC
This command checks and repairs system files even when Windows cannot boot normally.
4. Repair Windows Image Using DISM
If SFC does not fix the issue, the Windows system image itself may be corrupted. DISM repairs deeper system-level problems.
- Open Command Prompt from recovery mode
- Run the following commands one by one:
DISM /Image:C:\ /Cleanup-Image /CheckHealthDISM /Image:C:\ /Cleanup-Image /ScanHealthDISM /Image:C:\ /Cleanup-Image /RestoreHealth - Restart your PC after completion
DISM replaces corrupted system components required for successful boot.
5. Check Disk for Errors
Disk errors or bad sectors can prevent Windows from loading system files correctly
- Open Command Prompt from Advanced options
- Run:
chkdsk C: /f /r - Allow the scan to complete
- Restart your PC
This process repairs file system errors that may be blocking Windows startup.
6. Disable Driver Signature Enforcement Temporarily
In some cases, unsigned or corrupted drivers can trigger error code 0xc0000221 during startup.
- Enter Windows Recovery Environment
- Go to Troubleshoot > Advanced options
- Select Startup Settings
- Click Restart
- Press 7 or F7 to disable driver signature enforcement
If Windows boots successfully, update or remove problematic drivers immediately.
7. Use System Restore
If the error started after a recent update or system change, restoring Windows to a previous working state can fix the issue.
- Enter Windows Recovery Environment
- Go to Troubleshoot > Advanced options
- Select System Restore
- Choose a restore point created before the error occurred
- Complete the restore process and restart
System Restore does not affect personal files.
8. Reset Windows 11 (Last Option)
If none of the above fixes work, resetting Windows may be required to restore system functionality.
Available options:
- Reset this PC (Keep my files) – Reinstalls Windows while keeping personal data
- Clean installation – Recommended if system corruption is severe
Always back up important data before performing a reset.
Final Thoughts
Error Code 0xc0000221 on Windows 11 is a critical startup issue caused by corrupted system files, disk errors, or driver problems. In most cases, the error can be resolved using Startup Repair, SFC, DISM, or System Restore without reinstalling Windows.
If the problem persists even after resetting Windows, the issue may be hardware-related, such as a failing drive or memory module, and professional diagnosis may be required.
