The Internet is a great invention, without doubt, but it has a negative side, and that is that others can access your PC from outside to steal information or spy on your habits.
If you have information that is valuable in your PC the best thing you can do is arm your desktop against unwanted access (internal or external). And this is what SecurDesk does, it protects it with a password that stops anyone from getting into it. It has different levels of password to access different parts, and you can create new shortcuts or even use the new icons it offers in place of the Windows ones.