An extra security procedure regarding exam or other
critic files is to use encryption
to hide them.
How does encryption works? This article, from the
US-CERT website provides a brief overview
of the process: Understanding
On Windows 2000, it is possible to encrypt files/folders
in NTFS Volume. Right-click the file/folder you wish to encrypt,
choose Properties, click Advanced and check the box next to Encrypt.
However, this will not hide the file/folder
from any user who logs into your computer as "Administrator".
If you need a more advanced encryption system, you
may install the open source TrueCrypt software. This creates a
virtual encrypted disk on the computer that is only accessible through a
password. Critic files may be safely kept in the computer and will
be invisible to any other user.