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#11
Just encrypt your whole system drive with Truecrypt. That is the safest method to encryption. I wouldn't rely on containers if the information is highly confidential. Even deleting or encrypting page file on an unencrypted drive might not do the trick.
i encrypted my whole desktop HDD just in case somebody were to break into my house and steal it, my neighbors got their goods stolen so i saw the need to encrypt my HDD to keep my personal things safe in case they were stolen they would have to wipe it out and wouldn't be able to recover my files since i encrypted it with 7 wipe passes
so i would suggest encrypting the whole drive with 7wipe passes to be sure ,will take couple days but its worth it and you can stop it and continue it when ever even if you turn off your pc