the following two views on your compter as a means of self-incrimination were voiced this week in a criminal case: BOUCHER VS. THE UNINITED STATES OF AMERICA
Orin S. Kerr, an expert in computer crime law at George Washington University, said that Boucher lost his Fifth Amendment privilege when he admitted that it was his computer and that he stored images in the encrypted part of the hard drive. "If you admit something to the government, you give up the right against self-incrimination later on," said Kerr, a former federal prosecutor.
Lee Tien, senior staff attorney at the Electronic Frontier Foundation, a civil liberties group, said encryption is one of the few ways people can protect what they write, read and watch online. "The last line of defense really is you holding your own password," he said. "That's what's at stake here."
One may want to consider adding CryptoHeaven or PGP, Pretty Good Protection to their computer for free after concidering the above case. Just some food for thought.