A folder lock program lets you require a password to open a folder under its existing name and location. Folder Password Protector works on Windows 10 and 11, including Home. Lock denies access instantly; Encrypt scrambles every file with AES-256-GCM.
We built Folder Password Protector for Home users stuck at the greyed-out checkbox. It is free for one folder of up to 30 files; a license covers more folders.
- The copy is protected; delete the original
- To edit, extract the file, change it and repack
- To hide file names, choose 7z and tick the box
- The folder keeps its location and name
- Open with the password, work as usual, lock again
- Lock is instant; Encrypt adds AES-256-GCM per file
Lock or encrypt the folder in place:
1. Add the folder to the program, or drag it into the window.2. Pick Lock for instant protection on an internal NTFS drive, or Encrypt to keep files unreadable if the disk moves to another PC.
3. Set a password of at least 8 characters.
4. Save or print the recovery key. It works after a new motherboard or a reinstall because it is not tied to your email or hardware.
To password protect a folder without encryption, pick Lock: it sets a deny rule in the folder's permissions and can hide it without renaming or moving it. In our internal test, Lock applied to 50 folders in 319 ms. To password protect a folder on a flash drive formatted as FAT32 or exFAT, use Encrypt, which works on any file system. Argon2id key derivation makes offline password guessing slow.
What we measured:
We tested Encrypt on our own build on 25 August 2026. Each file grew by exactly 64 bytes for its header. After decryption, every file's SHA-256 hash matched the original.Your folders still open if you stop using the program. The 77-second demo shows the whole process on Windows 10.
Can BitLocker protect a single folder?
BitLocker encrypts whole drives or partitions, protecting your folder along with everything else on the drive. It helps against laptop theft. To protect one folder on a shared PC, use a folder-level method.
Microsoft's BitLocker overview describes it as volume encryption. It ships in Pro, Enterprise and Education. Home offers a lighter version, device encryption, on supported hardware. Both open the drive when you sign in, so anyone using your account sees everything.
You can keep sensitive folders on a separate USB drive and password protect a USB drive with USB drive encryption software. Some people use a VeraCrypt volume as a container instead.
Is hiding a folder or a batch "locker" script real protection?
A hidden folder reappears when someone turns on "Show hidden files" in File Explorer. Popular batch "locker" scripts rename and hide folders, leaving the password in plain text inside the script.
These scripts still circulate in forum answers. They rename the folder to a system class ID so it looks like a Control Panel item, then mark it hidden and system. Anyone can read the password by opening the .bat file in Notepad. One Tom's Guide user reported that the correct password produced a command error instead of opening the folder.
Never keep your only copy in a script-locked folder. If the script breaks, you have no recovery key or support. Your files remain behind a renamed system folder that may be hard to open.
Are free folder-lock programs safe to install?
A reply in Microsoft's Tech Community warns that some free folder lockers carry malware or use weak encryption. Check how a program handles your files before locking anything you cannot replace.
What to check before you install one:
- The vendor names the cipher (AES-256 or similar) and explains how it derives the key from your password.
- The lock does more than rename the folder; a program that only renames folders leaves them under the wrong name if you uninstall it.
- You keep the recovery key yourself; it is not tied to your email account or PC hardware.
- You can open and decrypt folders without paying, even after the free tier ends.
- Encryption writes to a temporary file first, preventing half-written files after a crash or power cut.
Microsoft Store programs are signed and sandboxed, but the Store badge tells you nothing about their encryption.
What happens if you forget the password or lose the EFS key?
A forgotten 7-Zip password means losing the files; there is no reset. Losing your EFS certificate is just as final. A recovery key, such as the one Folder Password Protector provides, gives you another way in.
- Archive: store the password in a password manager. If you used WinRAR, RAR password recovery can only try guesses and works on short passwords.
- EFS: keep the exported .pfx certificate on a flash drive in a drawer, away from the PC.
- Folder lock: print the recovery key or save it outside the protected folder.
Spend a minute opening the protected folder with your password before deleting anything or closing the program.
Folder Password Protector
