How Do I Lock a File on My Computer?

You can lock a file on Windows with dedicated password-protection software, Windows Encrypting File System, or an encrypted archive. The right choice depends on whether the original file must remain active, access should follow one Windows account, or you need a protected copy for transfer.

For files you open and update regularly: use GiliSoft File Lock Pro to lock, hide, or protect the original item in its current location.

For account-bound encryption: use Windows EFS on a supported edition and back up the encryption certificate.

For sending or storage: place the file inside a password-protected archive.

How to Lock Files on Windows: 3 Common and Efficient Ways

MethodBest forHow access works
GiliSoft File Lock ProFiles that stay in their current folders and are opened or updated regularlyA File Lock Pro password controls locked items; hide and change-protection modes are also available
Windows EFSFiles tied to one Windows account on a supported editionThe Windows account and encryption certificate control access
Password archiveProtected copies sent, uploaded, or stored as one packageThe archive password is required before extraction
Method 1 - Recommended for everyday files

Method 1. Lock Files with Password Protection Software

This method keeps the selected file in its original location. You can lock access, hide it from ordinary browsing, or keep it visible while preventing unwanted edits and file operations.

Best for: everyday local filesTool: GiliSoft File Lock ProResult: lock, hide, or protect in place
  1. Open File Lock Pro and enter the master password.
  2. Choose Local Disk, then open Locking File.
  3. Click Lock Files/Folders and select the file, folder, or drive you want to protect.
  4. Apply the lock, then test the item from Windows Explorer.
Hide files with GiliSoft File Lock Pro
Hide selected files from ordinary browsing.
Lock files with GiliSoft File Lock Pro
Lock files, folders, or a local drive.
Protect files from unwanted operations
Protect visible files from unwanted operations.
Locking File

Keeps an item visible but blocks opening it without authorization.

Hiding File

Removes private files, folders, or a drive from ordinary browsing.

Protecting File

Helps prevent unwanted rename, move, delete, write, and copy operations.

For portable encrypted output: open More Tools > File Encryption when you want a separate encrypted package rather than a rule applied to the original file.
Method 2 - Built into supported Windows editions

Method 2. Encrypt Files with Windows EFS

Encrypting File System (EFS) connects access to a Windows user account and encryption certificate. It is not a separate password prompt for each file, and availability varies by Windows edition.

Best for: account-bound encryptionTool: Windows EFSResult: encrypted file tied to your account
  1. Right-click the file, choose Properties, and select Advanced.
  2. Enable Encrypt contents to secure data, then apply the change.
  3. Choose whether to encrypt only the file or its parent folder as well.
  4. Back up the EFS certificate and recovery key to a separate safe location.
Open Advanced Attributes from Windows file properties
Open Advanced Attributes.
Enable Encrypt contents to secure data in Windows
Enable file encryption.
Choose Windows file or folder encryption scope
Choose the encryption scope.
Important: EFS depends on the Windows account and certificate. Back up the certificate before reinstalling Windows, moving drives, or changing account access.
Method 3 - Best for a protected copy

Method 3. Compress Files into a Password-Protected Archive

A password archive is useful when several files need to travel together by email, cloud storage, or removable drive. It protects the archive copy, not automatically every original file left on the PC.

Best for: sending a protected copyTool: an encryption-capable archive utilityResult: password-protected archive
  1. Select the files and add them to an archive with an archive utility that supports encryption.
  2. Choose an encrypted archive format and open its password settings.
  3. Enter a strong, unique password and create the archive.
  4. Test extraction, then protect or securely remove any unprotected originals if necessary.
Add files to a password-protected archive
Add the selected files.
Choose archive encryption settings
Choose archive settings.
Set a password for the protected archive
Set and confirm a password.

Choose the method that matches the job

  • Use File Lock Pro when the original file should remain in place but access or file operations must be controlled.
  • Use EFS when account-bound Windows encryption fits your edition and certificate-management plan.
  • Use a password archive when you need one protected copy for sending, uploading, or backup.

File locking FAQ

Can I put a password directly on a file in Windows?

Windows does not provide one universal password button for every ordinary file. EFS uses your Windows account and certificate. File Lock Pro provides a dedicated password-controlled locking workflow.

What is the difference between locking and encrypting a file?

Locking controls access to the original file in its current location. Encryption transforms the file data or places it in an encrypted container so it cannot be read without the required key or credentials.

Can I lock files on a USB drive?

Yes. File Lock Pro supports files on USB and external storage. For a portable secure area designed specifically for removable media, see GiliSoft USB Encryption.

How do I prevent a file from being deleted or renamed?

Use the Protecting File workspace in File Lock Pro when the item should remain visible but common file operations such as delete, rename, move, or write need control.

Lock, hide, or protect Windows files from one interface

Use GiliSoft File Lock Pro for local files, folders, drives, USB storage, and shared folders without repacking active files each time you use them.

Download TrialBuy File Lock Pro