1. This problem started only about a week ago. Whenever I download a file off the Internet, that bit is added to each download (when I do right click > properties). As a result, I have to right click > properties > unblock every single file I download.

On other forums, the proposes solution is to run the Group Policy Editor (gpedit.msc), then go to User Configuration > Administrative Templates > Windows Components > Attachments Manager, and configure some items there.

Only problem is: I have no Attachments Manager viewable in the Group Policy Editor. (Also, the corresponding part of my registry is similarly missing)

So (1) can I fix the problem without this method, or (2) how do I get back the ability to edit my group policy?

2. The solution here is (for OFFICE 2010) OPEN UP WORD, FILE > OPTIONS > TRUST CENTER. Then click the TRUST CENTER button > Protected View, and UNTICK ALL 3 BOXES.