Windows 10 file problem

[Chris Merchant]

I'm not sure this is a Windows 10 issue. I'm not just using Windows 10 but am an Insider and so am running builds beyond what the general public uses, and I'm not seeing this on any of my computers. Maybe something with your email?

Who knows? I am using the stock email program that came with Windows 10.

I dont use the built in email app for 10 but I wonder if it is saving attached files as read only for security reasons.  Or if you are also using an internet security application like mcaffee, perhaps that is affecting it.  There may be some settings you can access to change this perhaps.