You can hide or or un-hide folders in Windows OS without third party software, and also you can password protect the folders with third party tool.
Anvi Folder Locker is another free app to password protect important files and folders on Windows operating system. It is free, but still comes with an elegant and easy-to-use user interface.
Anvi Folder Locker
Head over the official download link, which is provided at the end of the article and download the free copy of Anvi Folder Locker. Install it in PC and run it.
The another feature of Anvi Folder Locker is it adds Lock with Anvi Folder Locker option to file context menu, to quickly lock files without having to manually launch Anvi Folder Locker every-time. If you are not interested in this context menu feature, you can change it through setting.
In addition to locking folders / files, Anvi Folder Locker lets change folder permissions to stop others from viewing, modifying and deleting the files / folders. It provides variety of options : Hide and Lock / Hide / Lock / Read Only / Password.
Once, you want to uninstall it from your PC, it needs the master master.
Anvi Folder Locker is full of features and in size it is approx 13MB. In my opinion, it is the best tool that can be used to secure your files / folders from others.
This tool is compatible with Microsoft Windows XP (32-bit and 64-bit) with SP2/SP3 or Home/Professional/Media Center, Vista (32-bit and 64-bit) Starter/Home Basic/Home Premium/Business /Ultimate, Windows 7 (32-bit and 64-bit) Starter/ Home Basic/Home Premium/Professional/Ultimate and Windows 8 / 8.1.