Every time I try full system encryption with truecrypt (AES) I'm getting a 'pretest failed' message after my test reboot. The thing is, nothing actually fails, I get a password prompt from the boot loader, windows start correctly first time.

I'm using a samsung 1TB HDD with NTFS, AES encryption, 7 Pass US DoD 5220, default hash algorithm.

I'm really lost when it comes to looking at ways to by pass this but I do genuinely need my system encrypted.

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Error message

  • Were you using an algorithm other than AES? Please post a screenshot of the settings used.
    – Jim G.
    Aug 28, 2012 at 22:59
  • I'm having the same problem and I can't find a single result on Google about how to troubleshoot the problem.
    – Apache
    Aug 30, 2013 at 12:26
  • Ever find a solution to this?
    – crdx
    Mar 11, 2014 at 11:30
  • This test is unrelated to AES or encryption. It's just a test whether the bootloader works, because you'd be (almost) SOL if it didn't after encrypting your system.
    – Daniel B
    Oct 30, 2015 at 21:56

1 Answer 1


had the same issue - turned out the problem was 100Mb boot partition - it was located on another HDD! I marked Windows partition as active, deleted that other one - and everything worked well.

  • This only works if there's a copy of the Windows Boot Manager installed. bcdboot is an all-in-one command to install it.
    – Daniel B
    Oct 30, 2015 at 21:58

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