Microsoft Windows Error Code 0xC0000277: How to Fix It

Medium 20-40 minutes Medium Severity Verified June 2026
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Error Code
0xC0000277
Brand
Microsoft Windows
Product Type
operating_system
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
20-40 minutes
Error code 0xC0000277 (STATUS_FILE_NOT_ENCRYPTED) occurs on Windows when a file is expected to be encrypted but is not. This often relates to the Encrypting File System (EFS) or BitLocker. The error typically appears when attempting to access or modify a file that should have encryption enabled. This guide provides simple steps to resolve the issue without data loss.
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Tools You'll Need

How to Fix Error Code 0xC0000277

  1. Back Up Important Files

    Always back up data before modifying encryption settings.

  2. Enable File Encryption via Properties

  3. Use Cipher Command to Encrypt a File

    Ensure the path is correct to avoid unintended encryption.

  4. Check EFS Certificate and Recovery Agent

    Modifying certificates can affect access to encrypted files. Proceed with caution.

  5. Repair or Restore System Files

  6. Perform a System Restore

    System Restore will undo recent system changes but not affect personal files.
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When to Call a Professional

If the error persists after these steps, or if you cannot access encrypted files without a valid certificate, contact a professional data recovery service or Microsoft Support.

Frequently Asked Questions

What does Windows error 0xC0000277 mean?
It's a STATUS_FILE_NOT_ENCRYPTED error, meaning a file expected to be encrypted is not. This typically occurs with EFS or BitLocker.
Can I fix error 0xC0000277 without losing data?
Yes, most fixes like enabling encryption or using the cipher command do not cause data loss. Always back up first.
Why did this error appear suddenly?
Possible causes include corrupted EFS certificates, incorrect file permissions, or changes to encryption policies after a Windows update.
Do I need a professional to fix this?
If basic steps fail, or if you're unable to access critical encrypted data, a professional may be needed to recover certificates or data.
Is error 0xC0000277 related to BitLocker?
It can be. BitLocker encrypts entire drives; if a file on such a drive loses its encryption status, this error may occur.

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