If you want to know how to lock a folder in Windows 7, download this freeware tool and watch the video after the break.
Folder Lock is a well-known program that has been around for years and is considered a best folder lock program for Windows 7 systems. It gives fast and lightweight data encryption and password protection for folders, drives and even discs. It uses a “locker” system, which you operate with a single click. Lockers are portable (by flash drive, upload or email), and they have advanced hack-detection, data shredding and encryption tools for additional protection. The software costs $39.95 for a single-user license, with a free trial for a limited time.
Also make sure to check out the best folder lock software for Windows 7 (trial, shareware)