Encrypt whole laptop harddisk

[aby]

can any one suggest me an opensource thing to encrypt my laptop harddisk.

[Metu69salemi]

google's answer is as an example: truecrypt

[Cry Havok]

You'll find that many modern OSs have built in support, including Windows, Linux and BSD. What OS are you using (eg "Windows 7 Pro" or "Ubuntu 11.04" or "FreeBSD 8.2").

[aby]

I want it from XP to win 7

[aby]

what about truecrypt??

[Metu69salemi]

@aby:

what about truecrypt??

@aby:

can any one suggest me an opensource thing to encrypt my laptop harddisk.

@truecypt:

T r u e C r y p t
Free open-source disk encryption software for Windows 7/Vista/XP, Mac OS X, and Linux
Main Features:

Creates a virtual encrypted disk within a file and mounts it as a real disk.

Encrypts an entire partition or storage device such as USB flash drive or hard drive.

Encrypts a partition or drive where Windows is installed (pre-boot authentication).