Laptop BitLocker failing on drive with file permission errors

4.5

The SYSTEM account lacks permission to read certain files, blocking encryption.

Symptoms
  • "Access Denied" error
  • Encryption stops at X%
  • Log errors
Possible Causes
  • Manual permission changes
  • Third-party security software

Step-by-Step Fix

1

Reset Permissions

Use "icacls * /reset /t /c /q" to restore default permissions.

2

Take Ownership

Ensure the SYSTEM and Administrators groups own all files.

3

Disable Antivirus

Temporarily disable AV that might be locking files.

When to See a Technician

BitLocker runs as the SYSTEM account; it must have full access to every byte on the drive.

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