A newer version of TrueCrypt is available.Or, Learn More About TrueCrypt
Full user review
"Excellent when it works"
When it works, it provides a wonderful free service that fully and privately encrypts files and systems.
It does not always work. Whether it works or not depends on whether the computer uses a GUID partition table or a MBR partition table. This seems to depend on the size of the harddrive - smaller hard drives can use MBR. Larger ones require GUID. TrueCrypt works on MBR but not on GUID, which leaves me extremely disappointed with my beautiful new desktop - I can't use it securely. Other software, including Symantec PGP and Microsoft BitLocker also failed to work. PGP probably failed for the same reason TrueCrypt failed. BitLocker failed for other reasons.
I hope TrueCrypt can add GUID partition table compatibility. I did donate the last time TrueCrypt worked for me.