Windows XP creates a hidden share for every drive on your computer. C$, D$, etc. These shares are accessible only to user accounts with administrative privileges, meaning any account that you created during the installation of windows XP.
Essentially, this means that anyone with a valid username and password from your system can get access to anything on your drives remotely. While this is the number one reason why you should always use good passwords on your Windows user accounts, this feature can be disabled with a little registry tinkering.
Procedure to follow
Click on Start—>Run type regedit click ok
Navigate the following key from left pane
Add the Dword value ‘AutoShareWks’ with a value of ’0′ in your right pane
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