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How To Beat Windows Vista/7 Downloaded File Protection

OK, so Windows Vista introduced a feature that was continued in Windows 7 that does some funny things with file downloads.

* When you download something from the internet and save it on an NTFS partition it manages to attach what is basically an extended file attribute to the file which lists where, hostwise (ex: www.downloadsource.com) it was downloaded from.
* From there, when you try to open that file you may get a message (one of the links below has a pretty picture) saying the file has been blocked from opening.
* Better yet, if you try to open it in a batch operation or from behind-the-scenes, it will sometimes silently fail to open or just return useless error codes that don't accurately describe what prevented the file from opening.
* You can RClick on the properties of a single file and click 'unblock' to unblock a single file... but what if you have a lot of files?
** image here: http://www.petri.co.il/images/file_protection_1.gif)

Here is a 2-step process to remove current blocks and prevent future files from getting blocked.
# '''Step1''': Original directions were retrieved from this source: http://superuser.com/questions/38476/this-file-came-from-another-compute...
## Remove existing blocks from all files in a directory (and it's subdirectories)
## Download this neat little app: http://www.nirsoft.net/utils/alternate_data_streams.html
### This app allows you to see the 'extended attributes' saved by NTFS that are normally very hidden
## Use it to remove all streams marked '':Zone.Identifier:$DATA'' by
### (I strongly recommend following this method from the link above to remove ONLY '':Zone.Identifier:$DATA'' and not muck with other streams
### See the other comments on the post above as to why other streams may exist... note apple is very good at adding these info types!
# '''Step2''': Original directions came from here: http://www.petri.co.il/unblock-files-windows-vista.htm
## Now prevent future files from saving this information
## In Windows 7, Click Start.
## In the Search box, Run box or console window type: GPEDIT.MSC to bring up the Group Policy Object editor.
## Navigate to User Configuration > Administrative Templates > Windows Components > Attachment Manager. Here you will find a couple of policies related to this feature, but to disable it you'll want to ENABLE the policy called "Do not preserve zone information in file attachments".
## Close the GPO editor.
## Either logoff your computer, or refresh the local policy by typing the following command in a Command Prompt or in the Run box:
gpupdate /force