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Basically when I download a zip archive, typically in chrome, but this happens in Mozilla as well, the files in the archive are encrypted (EFS) when I unzip them. Not password protected or anything related to the zip functionality but actually encrypted using Windows EFS.

I cannot for the life of me figure out what is causing this.

Screenshot: enter image description here

However, if I back out to see the root folder, the base directory is not encrypted:

enter image description here

Just to be certain, the zip download is also not encrypted. Have double checked in the properties as well.

enter image description here

I use EFS in a few folders on this computer, but this happens no matter what folder I put the archive into. I can keep it in downloads, move it to my documents, desktop etc., and when I unzip it using the Windows built in application, the folders and files in the archive are always encrypted.

I've searched all over and cannot even find another example of this or what I need to look for to figure out why Windows is doing this when I unzip an archive.

To summarize:

Windows 7_64

Downloaded ZIP archive

Unzip using Windows 7 built in extraction application

Subfolders and files but not the root folder are always encrypted using my EFS credentials.

Windows is always kept up to date. Have always run Eset smart security on this computer. EFS is used in several folders on this computer, but never ones like desktop or downloads or my documents. Any suggestions or direction on this would be greatly appreciated.

Screenshots of the properties of these folders. This is for an archive that is kept in downloads.

Downloads folder properties:

enter image description here enter image description here

Archive properties (unblocking doesn't change anything):

enter image description here enter image description here

Properties after unzipped:

enter image description here enter image description here

Properties of encrypted files:

enter image description here enter image description here

  • Provide a screenshot of the Properties of the source folder, that you placed into an .ZIP archive, its not unrealistic that a program like WinZip archive the contents with the exact properties the files and folder has. "hen I unzip it using the Windows built in application, the folders and files in the archive are always encrypted." - This is to be expected if your extracting the folders to one of those encrypted locations, or perhaps your entire profile is using EFS, submit more information. – Ramhound Nov 9 '16 at 21:29
  • Updating, the base folders are not encrypted, but posting the screenshots from them. – Jestep Nov 15 '16 at 15:23
  • I posted the comment before adding the screenshots, let me know if there are other properties you need to see. – Jestep Nov 15 '16 at 15:32
  • Based on the information, the .zip file itself is not encrypted, but the contents that are being extracted are encrypted. This either means when the zip file was created the contents were encrypted, if thats the case, unecrypt them and create a new archive. Have you simply unchecked, encrypt contents to secure data, that will decrypt the contents. My suggestion would be to use something other then the built-in functionality to extract the contents of the archive. – Ramhound Nov 15 '16 at 15:40
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    I'll start digging there. This specific computer is not currently on a domain, it may have been in the past, but I will see if I can find anything in the local policy that might affect this. – Jestep Nov 15 '16 at 16:47

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