Windows 7 - Prevent printed *.pdf files to get the curr owner: Instead "Everyone"

When I print a certain Windows 7 webpages from either Firefox or IntExp into a pdf file it works fine.

However when I go for such a created pdf file to context menu

Properties->Security

then there is only the current user "pet" (=the user who printed the file) listed.

On another Windows 7 system for a similar pdf printing operation as "Group or user names" the entry "Everyone" is taken.

How can I achieve on the first mentioned system that here as well "Everyone" is taken as default for all future print operations?

Furthermore: How can I list all files on partition D: which are linked to e.g. user "pet"?

Is there a command/tools which is able to scan and filter them out?

Is there a bulk operation which convert hundreds of files from user "pet" to everyone"?

Thank you
Peter

The permissions applied to a file is, should be, determined by the folder the file is located in. If the folder has "Everyone" then files created in the folder, unless specifically overridden by the software, the file will take the permissions from the folder that applies to the file.

Great. Thank you

And how can I bulk re-assign different owners/users to a set of existing files?

Peter