How do we can Lock the Folder and a entire Drive with the password in our Windows7 System?

You can either download applications like http://download.cnet.com/Folder-Lock/3000-2092_4-10063343.html or password folder for the internet. Most of them are Free download.  If you are an advance user, you can even a folder lock for yourself in Windows. Here are details steps on how to do that http://receivetipstricks.com/how-to-make-your-own-folder-locking-software/ You can even make a separate hard drive for all your secrets folder and then make it invisible using Diskpart command Reference http://receivetipstricks.com/how-to-hide-drives-partions-using-cmd

Locking or hiding a hard drive is a easy way just like hiding a folder or file and more than many people don't know about this process. It is very simple you just have to manage your settings without downloading any software or any other tool. Just go to manage and choose disk management option where you can find a way to hide a file. JUST Click on the link and follow simple and free steps: http://www.technologypeak.com/computing/how-to-hide-and-unhide-your-hard-drives/