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EFS File Encryption - HELP ME!!!!

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#1 sgretka


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Posted 01 May 2017 - 12:17 PM

Hi All,


New member here but I'm hoping someone can help me!


Without going into too much detail I am an amateur producer who enjoys making music from home.


As you can probably imagine I have thousands of music samples and files that I have downloaded over the past few years that I use for making music.


However... I'm not too sure how but somehow I manager to activate the EFS function without knowing and encrypted all my files, it wasn't a problem at the time as it didn't affect me in any way but two days ago I had to reinstall windows as I stupidly managed to download an Adware Trojan and was forced to reinstall my OS.


Before I reinstalled Windows 10 I copied all of my wanted files onto an external HDD so I could do a full wipe on my system and start from fresh, but what I didn't know was I needed to copy the encryption certificate so that I could actually use my "encrypted" files which I obviously didn't do.


I'm using the same laptop as I was before but it will not let me decrypt the files or even copy them from the HDD to my laptop.


Is there any way around this?


Since learning what has happened I would have thought that because I'm using the same laptop/hardware that it wouldn't be an issue but it will not let me decrypt them and now I have potentially lost everything I had!


Please can someone tell me there is a way around this!


Many thanks in advance

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#2 Crazy Cat

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Posted 01 May 2017 - 09:08 PM

The Encrypting File System. https://technet.microsoft.com/en-us/library/cc700811.aspx

Windows 10: Backup Encrypting File System Certificate and Key in Windows 10. https://www.tenforums.com/tutorials/77225-backup-encrypting-file-system-certificate-key-windows-10-a.html
If you lose access to your encrypted files and folders, you will not be able to open them again unless you are able to restore your file encryption certificate and key used with EFS.

There is EFS Data Recovery software, but since you're using Win 10, it's highly improbable it will recover your files.

Efs Data Recovery for Encrypted Files and Folders. https://www.diskinternals.com/efs-recovery/
Advanced EFS Data Recovery. https://www.elcomsoft.com/aefsdr.html

Use Efsinfo or EFSDump apps to gather information on the EFS file.

Quickly Check Which User Encrypted a File. https://www.petri.com/quickly_check_which_user_encrypted_a_file
Efsinfo Overview. https://technet.microsoft.com/en-us/library/cc739973(v=ws.10).aspx and https://technet.microsoft.com/en-us/library/cc783243(v=ws.10).aspx
EFSDump v1.02 https://technet.microsoft.com/en-gb/sysinternals/efsdump

Two things are infinite: the universe and human stupidity; and I'm not sure about the universe. ― Albert Einstein ― Insanity is doing the same thing, over and over again, but expecting different results.



#3 RolandJS


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Posted 01 May 2017 - 09:56 PM

[moot - I just now saw the earlier answer already mentioning elmsoft :)  ]

Edited by RolandJS, 01 May 2017 - 10:04 PM.

"Take care of thy backups and thy restores shall take care of thee."  -- Ben Franklin revisited.


Backup, backup, backup! -- Lady Fitzgerald (w7forums)

Clone or Image often! Backup... -- RockE (WSL)

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