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Initially I successfully completed a whole disk encryption of my Window 7 32 bit HP laptop with Truecrypt. Subsequently, this same laptop was knocked off a table while CC Cleaner was running. On reboot I ran into many issues and had to go back to an earlier system version using a System Restore. After the laptop was stable, I also fully decrypted the drive. I have used a couple of tools to clean up the machine and fix registry issues after the decryption.

The PC is now running great, booting cleanly, and running/processing quickly.

I an now attempting to re-encrypt this same hard drive with Truecrypt. I disconnect all external items such as printers, phone chargers, and turn off Network/Internet access, and stop my antivirus software and end all un-needed processes, such as Bonjour, iTunesHelper.exe, etc.

Truecrypt now quickly encrypts the drive until around 96% of the drive is encrypted, then stops working, and freezes the balance of the laptop.

I have to unplug the machine and pull the battery to restart the machine.

I would appreciate any advice on what may be going on that is keeping me from fully encrypting my drive.

Thanks.

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The hard drive is probably failing or damaged. Have you tried another hard drive in the laptop? Does the drive stop at 96% or run really slow because it's having a hard time encrypting the data?

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It has actually done this twice. I ran a check disk and all appears well. Is there another tool or utility you would recommend to check the drive? – Dave W Jul 27 '12 at 17:01
    
@DaveW Spinrite is a good product to try. grc.com/sr/spinrite.htm – ponsfonze Jul 27 '12 at 17:44

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