EFS (or Encrypting File System) is a feature included in some high-end versions of Windows Vista and 7 which allows the user to encrypt data on a filesystem level.

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I started getting a weird message “Encrypting file system - Back up your file encryption key”

I started getting a strange message when I start my computer. An icon appears in the system tray, and a popup tells me "Encrypting file system - Back up your file encryption key". I know what EFS is, ...
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1k views

Accessing EFS-encrypted files after resetting Windows password

I have some EFS-encrypted files in Windows. The owning user account is protected by a password, which can be easily bypassed (i.e. reset) by many tools and methods. So what will happen to these ...
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2answers
3k views

I've lost access to my encrypted files

I have an account on Windows Server 2008 R2, which at the moment I am using as a desktop. I had certain files encrypted under a standard user account. I changed my password, and then lost power ...
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3answers
4k views

EFS - Find out what's encrypted

Since a few days when I start Windows Vista i get a Popup from "Encrypting File System" (coming from process efsui.exe) asking me to backup the certificate and key. I don't know what i did to get ...
7
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1answer
784 views

Encrypting search index using EFS

Is there anything wrong with encrypting the search index with EFS while letting the search service index encrypted files? I've encrypted the directory %ProgramData%\Microsoft\Search and I've added ...
6
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2answers
16k views

File Access Denied despite being administrator, owning the files, and having full permissions

I'm trying to copy data from my old laptops hard drive to my new desktop's. But on a certain folder, I can't copy any of the actual files - just the subfolders. I am informed that I require permission ...
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2answers
5k views

Decrypt EFS files

Here's my situation. Was using EFS on my Vista laptop - had a backup of my certificate. HD crashed...managed to recover some of my files (Encrypted) - but they "lost" the "Encrypted" attribute in ...
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1answer
797 views

Getting Through EFS (Encrypted File System)

I'm 99% sure, at this point, that the answer is, "not possible." But I figured there are tons of smart people here who might be able to help me out, even if that help is just to validate that it's not ...
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How to remove Encrypted flag when copying a file from a HDD to a USB drive?

Environment: Windows 7, but applies to other EFS-compatible Windows versions I have a file that is encrypted using standard Windows EFS encryption. When I copy that file to a USB drive using Total ...
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3answers
4k views

EFS disallows me from decrypting files on Windows 7?

I have a large folder with a lot of personal photos that I would like to copy. But Windows 7 won't let me. Apparently they are encrypted. I can't remember setting that, nor can I remember any sort of ...
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2answers
822 views

Get EFS to release file so that it can be deleted

I tried to encrypt a very large file 100+ gig using EFS and canceled when it said it was going to take 12 hours. Cancellation hung until I finally rebooted the system and now I'm unable to delete the ...
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2answers
1k views

What happens with EFS-encrypted files, if I install Windows 7?

I'm going to update my OS from Vista to Windows 7. I got some files (not on the OS-partition) encrypted with EFS. What happens if I install Windows 7? Will I still be able to access my files?
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1answer
518 views

Encrypting a folder

I'm familiar with bitlocker, having been using it for a while, but I am looking at just encrypting a folder instead. But I just don't understand the options it's giving me. When I right-click a ...
4
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1answer
3k views

EFS recovery from backed up registry files?

Here's what I have: Backed up encrypted files Backed up registry files (ntuser.dat) password The original OS (Windows XP) hosting the EFS encrypted files is gone. I do not have a backed up key ...
3
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1answer
76 views

Windows EFS encryption

I'm using Bitlocker for a full disk encryption solution. However, I'd like to avoid having to shut down my computer to leave it in a secure state. If I enable EFS encryption on the folders which I ...
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2answers
822 views

NTFS Directory is encrypted AND compressed?

I was running EFSINFO on my WinXP SP3 machine today, trying to find any EFS-encrypted files on the system. Imagine my surprise when I discovered my C:\xampp\htdocs\ directory is both NTFS-compressed ...
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1answer
3k views

What are differences between EFS and BitLocker in Windows? [closed]

We learned in MCITP about their features. Are there any conflicts between EFS and BitLocker? Can we use both of them together? If so, how?
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1answer
5k views

Who can decrypt EFS files?

I'm running Windows 7 Professional at home and decided to encrypt some of my files using the built-in EFS. My understanding is that only the account that encrypted the files can also read them again - ...
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1answer
312 views

Encryption software as easy to use as EFS

Is there any encryption software that works as transparently to the user as the built in EFS? I am trying to create a relatively secure folder for the users to store documents in, but with some users ...
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1answer
2k views

Windows 8 EFS: How to tell windows to use “this” certificate for EFS encryption?

On Windows 8, I turned on EFS and encrypted some files/folders. During this process, it created a self signed certificate and used that one for encryption. However, I have a specific certificate that ...
2
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1answer
138 views

Mounting old home directory from Windows 7 Image

I used dd to create an entire image of my hard drive before I reformatted. Windows 7 was installed. I've mounted that image using OSFMount (which, by the way, works great!). The problem I'm ...
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2answers
2k views

Unexpected Access Denied error while accessing EFS encrypted file

I am getting Access Denied error when I try to access some files. ACL is OK, all ACE's all intherited, I have full access to these files and I am the owner of these files. ACE's are exactly same as ...
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1answer
243 views

Why are some folders green colored on an external drive in Windows? [closed]

i just did a reinstalation of windows, noobish as i am i didnt notice the green colored folders on my external harddrive as i copyed my most beloved files. so i wonder if there is anyway to get pas ...
2
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1answer
105 views

Strange temporary “Access denied” error accessing encrypted files

After a system reboot (Win7 x64), an application reported that it couldn't access a file in an EFS-encrypted directory. Accessing via programs gave "Access denied". Permissions were normal and fine. ...
2
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1answer
175 views

How to use backup EFS certificate to decrypt encrypted files?

I have some files that were encrypted on a now extinct Windows 7 system. I made sure to backup my keys, this one is called efs.pfx. Double-clicking it launches the Certificate Import Wizard which ...
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869 views

Decrypt EFS-encrypted file (I do have certificate backup)

I have an encrypted folder on a Windows 8 machine, which was encrypted by another user-account (which I cannot boot into due to a corrupted profile). But I do have the private-key backup certificate ...
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1answer
2k views

Windows 7: EFS and Windows backup (system image) - Certificates not included?

I just encrypted my C:\Users\Username folder with EFS. I also backed up my EFS certificate (.pfx). Now I wanted to do a backup of my computer on an external HDD. I want to use the integrated Windows ...
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0answers
494 views

2 users cannot share one encrypted offline files share

This question I asked over a year ago in the MS social forums, with the answer being that by design it is not possible. I still wonder whether one could hack around this limitation, without using ...
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1answer
1k views

File encrypted on old PC, need to decrypt [duplicate]

Possible Duplicate: Getting Through EFS (Encrypted File System) My dad encrypted a file on a PC running Win XP. He got a new PC running Win 7. There were some files encrypted using Windows ...
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2answers
289 views

How do a run EFS decrypt on a directory?

In that directory, there's a mix of EFS-encrypted files, and just normal files. Is there a simple way to decrypt everything?
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1answer
40 views

How do I let the SYSTEM account use EFS encryption?

I want to encrypt some files used by a Windows service running as Local System (i.e. using the NT AUTHORITY\SYSTEM account). Since BitLocker doesn't seem to work with software RAID, EFS seems to be ...
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2answers
328 views

Encrypting %userprofile% using EFS?

Is it safe to encrypt my Windows 7 %userprofile% folder using EFS ? i.e. are applications or system logon going to be affected?
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1answer
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BitLocker vs. Encrypting File System (EFS) on Windows 7

So BitLocker encrypts the entire hard drive, while EFS encrypts individual files. Is there any difference in the way that they implement the encryption? Do they both use your user account password as ...
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1answer
38 views

If Bitlocker is turned on, How to decrypt OS volume when boot up?

I want to know decrypting process when boot up encrypted volume using BitLocker. Because MS says, it is encrypting entire disk drive whether the volume is installed OS or not, which means the file ...
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1answer
214 views

Remove EFS recovery agent from domain member

I cannot ask our Domain Admins to update recovery agent, since they are in other country and they serve millions of people worldwide (actually, I've asked with no success). GPO disables EFS at all, ...
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1answer
1k views

Win 7 cannot create file on EFS network share

I have a Win 7 Ultimate desktop machine (server) and a Win 7 Pro laptop (client) on a workgroup network. Both client and server machine have an administrator user account of the same name, with the ...
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EFS File encrypted with “System”

We're trying to set up EFS to secure a file share so that only a service account can access the files in it. Everything works fine, until we try to have an FTP process send files to the folder. ...
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118 views

How to turn off EDP on Windows 10

Since Windows 10 automatically updated to the latest version (November 2015 update I believe), all my EFS files are flagged with a lock icon. And when I copy an EFS-encrypted file to a FAT drive, it ...
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1answer
94 views

Can I use EFS to encrypt the user directory?

I want to know if doing so would prevent windows from logging in to the user or not, has anyone tried to encrypt the user profile folder or the windows folder?
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1answer
132 views

How to set the “encrypt” attribute on the root folder?

There is an "Encrypt contents to secure data" checkbox for every folder on the drive, except the root folder. It's accessible by right-clicking a folder, and selecting "Advanced" properties:   ...
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Backup EFS encryption key generated, but no encrypted files? Track what caused the key creation

In I started getting a weird message "Encrypting file system - Back up your file encryption key" a user experiences a prompt that I also experienced yesterday for the first time. Now the ...
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0answers
1k views

EFS not available on Windows 7 Home Premium: workarounds?

This may well be an easy question to answer. I am running Windows 7 Home Premium and my hard disk's file system is set to NTFS which in theory should support EFS. However I've read that EFS is only ...
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1answer
110 views

Recover EFS Certificatate Dead MoBo

I created an encrypted file with Windows 7 32-bit on a NAS (mybooklive) and backed the file (not the certificate) up locally to the computer's hard drive. The original Win7 computer had a motherboard ...
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108 views

If you reset the password for a user can other users access the EFS encrypted files?

I have a user that's forgotten their password. I can log in and reset it but there were some EFS encrypted files. I can still access those files because my login is the security group. If I reset ...
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1answer
71 views

EFS File not accessable after reboot

I have encrypted a file with EFS for a user (let us name this "User X"). An application which is running as "User X", is able to access the encrypted file. It keeps working fine across log off and log ...
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2answers
643 views

Any way to block EFS Data Recovery Agent?

It seems that using EFS is pointless if someone else has access to your computer because of DRA... someone could easily enable the Administrator account set a DRA save the keys disable the ...
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3answers
4k views

Vulnerability of EFS (Encrypting File System) on Windows 7

I am looking into using EFS (Encrypting File System) at file/folder level on Windows 7. I read Wikipedia article on EFS and it does mention several vulnerabilities related to Windows 2000 and XP. ...
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1k views

how to open encrypted folder

I have an encrypted directory using Windows XP Encryption. I didn't backup the certificate and I formatted my HDD to reloaded the OS as it was corrupt. I am now not able to access the encrypted ...
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3answers
897 views

What files can EFS encrypt?

What files can/cannot be encrypted with Windows 7 EFS? I am playing around with it in a VM and it seems the only files I cannot encrypt are the files under C:\Windows and files that are currently in ...
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1answer
37 views

Accessing Windows encrypted files on another PC

I am new to WIndows EFS and find it very useful except with a problem, can't access those files in another Windows PC. I find some tutorials on how to access them in other windows PCs(1, 2). After ...