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EFS UI Encrypting file system

Posted on 2014-04-08
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Last Modified: 2014-04-30
Hi there, over the last few days one of my computers has started asking to backup my encryption key.

The top of the dialogue box states "Encrypting file system". I have not chosen to encrypt the file system of the computer.

I'm really concerned about this, I don't want my FS encrypted at all.

I see there is a process running called efsui.exe

Any Ideas?
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Question by:MXDEWD
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by:Delete
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Have you encrypted any files on your computer?

To find if you have any encrypted files open an elevated command prompt (right click on the icon and select Run as administrator).  Then type the following command:

cipher /u

If it finds files that are encrypted then you do have encrypted files and or folders.

If you want to decrypt an encrypted file, right click on the file(s) that were found from teh above command and go to properties.  Under the General tab click on the "Advanced" button on the bottom left of the properties box.  Then uncheck the box next to "Encrypt contents to secure data" and click ok.
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by:MXDEWD
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Cheers Justin, ran cipher /u nothing found.
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by:Delete
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I am not sure then why you are getting that prompt.  Are you on either Ultimate or Enterprise editions of Windows 7?  If so do you by chance have BitLocker enabled?  If so maybe thats what is causing the prompt, however I would think it would label it as EFS.

I see a lot of people have had the same thing happen.  Not sure what your options are but can you choose for it to never ask you again?  If not just backup the keys which should make the prompt go away.

It doesn't sound like it is malicious and since you aren't using EFS it shouldn't actually back anything up.  If you are worried about it being malicious then run MalwareBytes before doing anything and make sure it comes back clean.
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by:MXDEWD
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Ok, I have Kaspersky installed, I'll run a scan with that then MWB.

Just seems strange that it should start happening. I use this PC mostly for doing image backups of customers PC's before I do any any serious work on them. I wonder if a customer may have had an encrypted file or two?? Could that do it?

Cheers Jason.
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Possibly.  You can look in your personal certificate store and see if you have any EFS type certificates listed in there.

Start -> Run -> mmc -> File -> Add Remove Snap-In -> Select Certificates and click Add -> Select Computer Account and Finish - > OK -> Expan Certificates -> Expand Personal -> click on Certificates and review whats in there.

If you find an EFS certificate in there then that could be the cause.
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by:MXDEWD
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HI Justin, good thinking but nothing could be found. Interestingly, this issue has not happened again.

I use this computer as a hard drive diagnostics and image backup computer. I wonder if one of the hard drives I had connected when this problem arose had something encrypted? Could this have been the case?

Cheers Jason
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