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Windows folder Encryption == Have I lost it all?

 
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post #1 of 6 (permalink) Old 03-09-2019, 04:28 PM - Thread Starter
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Windows folder Encryption == Have I lost it all?

I did a software based win 10 pro OS reset ... where it erases all file.

I saved all my personal data files to another older drive that has win 7. Thought I could just plug in later as a data drive and move data file over..

Thing is I forgot to UNENCRYPT the personal data file from the older version of win 10 before I saved it to the win 7 data drive. Now when I try to access the file, it say it's encrypted...

I thought I might be able to just fire up the old win 7 drive and maybe see if I could change permissions but the drive bsod (it was a run on a whole different rig/mob)

Am I hosed?

Does anyone have advice?

-wire



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post #2 of 6 (permalink) Old 03-09-2019, 05:54 PM
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Uh you didn't copy the key anywhere? :[

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post #3 of 6 (permalink) Old 03-09-2019, 06:13 PM
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If it's encrypted that means the data stored isn't exactly the data you saved. It jumbles the data up and you'd need the key to decipher the data back into what you started with.

Even if it's lower level encryption it could still take a server to brute force it.

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post #4 of 6 (permalink) Old 03-09-2019, 06:57 PM - Thread Starter
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Quote: Originally Posted by white owl View Post
If it's encrypted that means the data stored isn't exactly the data you saved. It jumbles the data up and you'd need the key to decipher the data back into what you started with.

Even if it's lower level encryption it could still take a server to brute force it.
darn, honestly I didn't even know how I turned it own. On the old o/s ever folder and item was downloaded and lock/encrypted with the yellow lock on the folder.

I 'd just right click and under advance untick the "change the encrypt to content to secure data".

it's like gigs of family photo's sigh ...

I'm game to try anything... what do you mean server/brute force :/



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post #5 of 6 (permalink) Old 03-09-2019, 10:09 PM
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You'd need an extremely powerful computer to pretty much guess the key over and over again.
Imagine you've got a combination lock with a sequence of 128 numbers. Enter one, then the other and so on to 128 entries. That's what's going on here.
You might ask Microsoft but I doubt even they can help if the drive is truly encrypted. Maybe it's not the entire drive though? Maybe it's just a part of the drive that's locked up. I can't say since I've never encrypted anything with Windows.


You're best bet is to log onto that HDDs copy of Windows somehow. How different was the old rig from the current rig?
Can you use that rig or build a similar one? If you know 100% that the drive had no issues booting before, that's what I'd try.
You may be getting a BSOD because it's Windows 7 and you're trying to boot with the wrong drivers. Is it possible to attempt booting that drive in safe mode?

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post #6 of 6 (permalink) Old 03-09-2019, 10:39 PM
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If it's a HDD you might still have a chance to recover the key. Stop using the drive that had the old Win10 install immediately. Every usage has a chance to overwrite more of the deleted data making it unrecoverable. Boot from a different drive and scan the old drive with Testdisk, Photorec or some other undelete utility.

If it's an SSD with TRIM everything has already been zeroed out and you're hosed, sorry.

EDIT: Also, brute force is extremely unlikely to work. In this case you're not up against a password created by a human (a weak password can be cracked in minutes), but instead an extremely long randomly generated number (take longer than the age of the universe).




Last edited by ltpdttcdft; 03-09-2019 at 10:46 PM.
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