dirLock is a great, free program only available for Windows, being part of the category Security software with subcategory Blockers & Access Control (more specifically Files & Folders).
More about dirLock
Since the software joined our selection of programs and apps in 2011, it has already achieved 368,264 installations, and last week it gained 56 downloads.
The current version of the program is 1.4 and was updated on 5/20/2011. It's available for users with the operating system Windows 2000 and former versions, and it is available in English.
About the download, dirLock is a fairly light program that will not require as much space than many programs in the section Security software. It's a very popular software in India, Russian Federation, and Kuwait.