No one suits them to be invaded in intimacy, especially if it is about personal files stored in their own computer available to some curious third parties, such as family members, colleagues, friends, etc. If you count yourself among those who face such problems daily, the solution Salvator is hidden in his own operating system, in Local Group Policy (provided you do not use a OS Home Edition, Basic, Premium - editions that do not support Local Group Policy Editor).
In order to restrict the access of the user so that they can access only certain programs, open Start Menu and type GPEDIT.MSC in Search program and files, then give Enter.

In Local Group Policy Editor open the menu below User Configuration, then the one below Administrative Templates and select System. In the right-hand panel gives double-click on Run only specified Windows applications.

In the open window select Enabled and then click on the button Show (langa List of allowed applications).

In respective list Type the names of applications to which you will allow user access and then click on OK.

Apply and OK in the main window and ready. Access to programs installed in Windows is restricted.

Accomplished mission. :)
Use: Tutorial was tested on Windows 7 Ultimate OS
*UPDATE: Because many users found that after activating Run only specified Windows applications I can no longer access Gruop Policy Editor To make further changes, To prevent this situation Be careful to enter in whitelist (List of allowed aplication) and mmc.exe (Microsoft Management Console). It is also recommended to Create a separate user For the other users of the system, if you want to restrict their access to various applications, and SA Protect your user under a safe password.
For users who After activating Run Only Specified Windows Applications I can no longer launch any application in the system The solution is as follows:
- open Start Menu and click on Run (For those who did not display Run Command at Start Menu, click-right on the button of Start and select Properties, then click on the button Customize. check The box next Run command, then give OK).

- in the field of right to Open write %systemroot%system32grouppolicyuser And give Enter

- In the open window, wipe the file Registry.pol
- data restart to the computer to Disable restriction access to applications.
Succes!
STEALTH SETTINGS – How to restrict users to run only specified applications in Windows (Windows Whitelist)