Windows 7: How to stop annoying Windows Security popup

I'm copying/moving files around my local intranet, and on certain file types (like .xls) Windows 7 keeps bringing up a caution box telling me "These files might be harmful to your computer". All I'm doing is dragging from one folder to another folder on my network, and I have to answer this box every single time - very annoying. More annoying is that I've spent hours looking for the simple answer that I'm sure is out there.

So far, I've done the following without success:

• Internet Options - Local Intranet - Sites - Advanced (to put in my company's server addresses.)
• Group Policy Editor - User Config - Admin Templates - Windows Components - Attachment Mgr - Inclusion List for Low File Types (which worked great to stop the other annoying message I got everytime I opened an Access file, but not for dragging these)

Anyone have anything else to try?

There is a much better fix for this. It doesn't require changing the risk type of a file. Add the respective file server NETBIOS name in your intranet to your Local Intranet zone. e.g. if the name of the machine you get the files from is "mymachine.example.lan" you want to add "mymachine" (without protocol) to Internet Options > Security > Local Intranet > Sites > Advanced. Depending on your Windows and SP/IE version this will add as "file://mymachine" or just "mymachine" to the list of Intranet sites. If you now open a "risky" filetype like .mdb or .exe on a shared network drive on this server you won't get this security warning anymore.

Obviously, this can also be done via GP. In my eyes this is a much safer and better way than your proposed solution.

I bet you already tried Internet Options --> Local Internet --> Security Level Low and Turn off Protected mode?

May bring some ideas: Description of how the Attachment Manager works in Windows XP Service Pack 2 (but I see you already tried some)

EDIT: Try this one, it should help: We know IE! : How to bypass the security warning "Unknown Publisher" with the checkbox "Always Ask Before Opening this File"


Or Maybe this one: