Firstly collect all your contents in to a folder that you intend to hide. Then download this simple and small software called the "Free Hide Folder" from here (size 743 KB). Install the software and execute it. It would ask you for a password, this password is for access this software itself.
Once you have set the password, opend the software and "Add File" that you intend to hide.. Thats it.. To undide the folder follow he same procedure. This is a very simple method of hiding your private folders especially when you are sharing your computer with others.
If you are interested in protecting your personal information, Free Hide Folder is just what you are searching for. With Free Hide Folder you will protect your files avoiding them to be being modified, seen or erased by other users. Well there are also alternate methods of hiding folders like hiding the file inside an JPG image (email me if you would like to know about this trick)
Give the "Free Hide Folder" a try and tell me if you liked it... Heres' the link to download the software