To avoid unwanted access to the data stored on your computer and to maintain your privacy, it is advisable to use an application like NVT Internet Privacy Cleaner. This application has been developed by Novirusthanks, a company specialized in security solutions.
NVT Internet Privacy Cleaner eliminates all trace of the user's activity while connected to Internet, preventing access to this information by unauthorized people. Among other elements that are eliminated are the cookies, browsing history, visited websites, written URL's, Internet temporary files, ...
It is also capable of deleting other data stored by your system like the information concerning recently opened programs and documents, temporary directories, cache, etc.
It is highly advisable to program your computer's cleaning with NVT Internet Privacy Cleaner each time the computer reboots.