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How do I decrypt a folder I encrypted with a previous Windows install?

OneSeventeen asked
Last Modified: 2013-12-04
I had a folder with all of my private data and decided to encrypt it for security reasons.

As usual, my windows machine got bogged down and got a few viruses, so I formatted and reinstalled (feeling fine since my data, including the encrypted folder, was all on a separate partition).

I am now unable to access any of my previously encrypted documents.

I understand this is a good thing, considering it means other people couldn't get my data if they stole the hard drive, but I'm hoping that because the partition is on the exact same hardware I might be able to decrypt it.  I can even tell it the username and password of the now non-existant user who created the folder and encrypted the contents.

Because I know the username, password, workgroup, computer name, and the hardware on the machine is all the same, can I retrieve the documents?  (I'm also using the same license of XP Pro.)

Tax season will be just a little bit harder considering I only save my online receipts in PDF format inside of this encrypted folder.
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