How to make your folders private ?

Open My Computer

Double-click the drive where Windows is installed (usually drive C :, unless you have more than one drive on your computer).

If the contents of the drive are hidden, under System Tasks, click Show the contents of this drive.

Double-click the Documents and Settings folder. Double-click your user folder.

Right-click any folder in your user profile, and then click Properties.

On the Sharing tab, select the Make this folder private so that only I have access to it check box. 

Note : 

• This option is only available for folders included in your user profile.
• When you make a folder private, all of its subfolders are private as well.