In Windows Vista and Windows 7 users can easily password protect their pen drives with BitLocker Drive Encryption. It is an inbuilt feature of both of operating systems.
While BitLocker is a drive encryption technology designed to secure the contents of the entire drive from unauthorized access.
You can see video tutorial about BitLocker at
http://windows.microsoft.com/en-US/windows7/products/features/bitlocker
In windows XP , There are lots of third party tools as USB Safeguard , Rohos Mini Drive , Cryptainer LE, TrueCrypt which can help your personal data password protected.
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Filed under: Computer Tips Tagged: | password protection USB