Lock Folder XP

Lock Folder XP 3.9

Developer Everstrike Software

Helps you password-protect or hide important documents.

Advanced File Lock

Advanced File Lock 7.1

Developer Blue Lakes Technology, Inc.

Advanced File Lock allows you to lock or hide any file with a few clicks.

Password Protected Lock

Password Protected Lock 2.9

Developer SoftFolder Inc

Tool that allows you to protect your computer from being used by others.

Predator

Predator 3.6

Developer Richard Goutorbe

Predator allows you to lock/unlock with a USB Flash Drive.

More 

Windows Simulate File Lock Unlock

 Programs:
BUFFALO Secure Lock Ware

BUFFALO Secure Lock Ware 2.6

Developer BUFFALO INC.

A free tool to keep the data in your Buffalo USB drives locked and secure.

Gili File Lock

Gili File Lock 6.3

Developer Gili Soft, Inc.

GiliSoft File Lock is designed to password-protect or monitor your files.

PDF Prime

PDF Prime 2.1

Developer Spireframe Software LLC.

A PDF utility that allows you to split, merge, and unlock/lock PDF files.

Stellar Phoenix Outlook Password Recovery

Stellar Phoenix Outlook Password Recovery 2.0

Developer Stellar Information Technology Pvt Ltd

A perfect utility to recover lost and forgotten passwords of MS Outlook file.

Portello CMS Admin

Portello CMS Admin 1.0

Developer Portello AB

This is the tool used by the Webmaster to lock or unlock areas for editing.

AiniShare File Lock Deluxe

AiniShare File Lock Deluxe 1.5

Developer AiniShare Software Inc.

Ainishare File Lock Deluxe is the best data encryption software.

AiniShare File Lock Standard

AiniShare File Lock Standard 1.0

Developer AiniShare Software,Inc.

Ainishare File Lock Standard is easy to use file encryption software.

Lock and Unlock Your PC With USB Drive Software

Lock and Unlock Your PC With USB Drive Software 7.0

Developer Sobolsoft

Use a physical USB device to lock your computer instead of a password.

Directory password Security

Directory password Security 1.2

Developer Bomchikbom Ltd.

Directory password security can apply password on a directory or file.

Unlock PDF

Unlock PDF 11.0

Developer Unlock PDF

Remove restrictions from a PDF file to unlock PDF file.

Other 

Windows Simulate File Lock Unlock

 Downloads:
LocK-A-FoLdeR

LocK-A-FoLdeR 3.1

Developer Gurjit Singh

LocK-A-FoLdeR is a program that allows you to hide and lock up any folders.

TDSOFT - Lock.Unlock TDSOFT

TDSOFT - Lock.Unlock TDSOFT 1.0

Developer Marc GAMOUS

HostsXpert

HostsXpert 4.4

Developer funkytoad

HostsXpert is an ultra-groovy Hosts file Manager, Editor and Helper-outter.

Estelar PDF Unlock Tool Demo

Estelar PDF Unlock Tool Demo 3.3

Developer Estelar Software Inc.

Estelar PDF Unlock Tool can unlock a PDF file in just few seconds.

PDF Lock Unlock Tool Demo

PDF Lock Unlock Tool Demo 1.0

PDF Unlock & Lock

PDF Unlock & Lock 2.3

Developer PDF1 Inc.

This app helps you to unlock and lock restrictions from Adobe PDF files.

PDF Lock Unlock Tool

PDF Lock Unlock Tool 2.0

Developer PDF Lock Unlock Software

It is a neat tool designed to lock and remove restrictions from PDF files.

Free EXE Lock

Free EXE Lock 6.6

Developer FreeEXELock, Inc.

A program that allows you to lock and unlock programs on your PC.

Lock Folder & Files

Lock Folder & Files 1.5

Developer Nexsols Inc.

Simple yet effective utility to lock and unlock your private folders and files.

Lock and Unlock Your PC With USB Drive

Lock and Unlock Your PC With USB Drive 7.0

Developer Sobolsoft

PDF File Password Remover

PDF File Password Remover 1.0

Developer PDF Password Remover

PDF File Password Remover safe to remove PDF password and unlock PDF file.