ghostmachine

I was actually referring to this post:

does windows xp have support for drive encryption , what i was able to found about was encryption on file or folder
The tool you gave a link to gets round this problem by starting from the BIOS/CMOS?

1. You power up and it asks for a password.....................that technology is very old, and easily circumvented.

2. On the next boot, it will get me to the drive decryption password..........which I would already have extracted and cracked...........so I type it in and it loads the operating system and all his files, nicely decrypted for me.

My points were that you cannot decrypt from within an operating system, if you have encryped it as well. And if you allow physical access you have very little security at all.

Supposing in step #2 I booted from a floppy or CD and reformatted his hard drive then overwrote the blank space 7 times?

This is why I have asked for more information on the security requirement and the environment.

If it is just to stop the office cleaners or security guard playing on your machine whilst you are out, then your tool would probably do just fine.............they will just wander off and find one that isn't protected.