دوشنبه، آبان ۱۷، ۱۳۸۹

How to Turn BitLocker On or Off without a TPM for Windows 7 Drive

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This will show you how to turn BitLocker Drive Encryption on or off for your Windows 7 or other operating system drive or partition when your computer does not have a Trusted Platform Module (TPM). When BitLocker Drive Encryption is turned on, you will be required to plug in the USB flash drive that contains the startup key before starting the computer to unlock the Windows 7 or other operating system drive or partition at startup.
When you add new files to the Windows 7 or other operating system drive or partition that is encrypted with BitLocker, BitLocker encrypts them automatically. Files remain encrypted only while they are stored in the encrypted drive. Files that are copied to another drive, partition, or computer are decrypted

REQUIREMENTS:
• BitLocker is only available in the Windows 7 Ultimate and Enterprise editions.
• A USB flash drive. BitLocker will store its key on the flash drive to use to unlock the Windows 7 drive at startup.
• Have at least two partitions. One partition must include the drive Windows 7 is installed on and must be at least 400 MB. This is the drive that BitLocker will encrypt. The other partition is the active partition, which must remain unencrypted so that the computer can be started. If you have the 100 MB System Reserved partition that Windows 7 creates during installation on a blank drive or partition, then BitLocker will store the key on it instead. If your computer does not have two partitions, BitLocker will create them for you. Both partitions must be formatted with the NTFS file system.
• A BIOS that supports USB devices during computer startup.
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