Removing the "Open File - Security Warning" in windows 8?

I like to study a lot of code from various sources from around the internet, and a big part of that involves downloading and opening the files to view the source code.

Now every time I try to open these files it gives me a prompt to make sure that the file is from a valid source and that I trust it to run.

There are many answers on this site, that deal with this issue on the following OS; Vista, XP and 7, but I couldn't find one for 8, and I could not get any of the others to work!

Could someone please tell me how to disable this very annoying feature for someone like myself?

I had a very similar problem on my brand new Windows 8 laptop. The desktop icons (.lnk)'s gave the same "open file security warning". Don't know why or what happened but what a pain. I finally found a solution, at least for the desktop icons doing it. I didn't want to fix it with changes to IE10 settings, like some suggest, because that just seemed risky.

This worked for me:

1. Press Windows button + X to open the Tools menu
2. Select: Command Prompt (admin) to open the black DOS window with C:\Windows\system32\>

3. Enter

   cd \Users
   

   The display now says C:\Users>

4. Enter (replacing "YourName" with your username)

   cd YourName 
   

   The display now says C:\Users\YourName>

5. Enter

   cd Favorites 
   

   The display now says C:\Users\YourName\Favorites>

6. Enter

   cd Desktop 
   

   The display now says C:\Users\YourName\Favorites\Desktop>

7. Type and enter:

   C:\Users\YourName\Favorites\Desktop>ICACLS *.LNK /L /SETINTEGRITYLEVEL MED
   

All the links on your desktop should come up as:

processed file: whatever.lnk
successfully processed 10 files; Failed processed 0 files.

Sorry for the long hand on the DOS commands, I remember them from back in the day but, this is laid out for anyone to easily follow.

Add a system environmental variable SEE_MASK_NOZONECHECKS and set the value to 1.

Make sure it's a system level variable or it will go away on reboot.

Use of Environment Variable in Windows 8

@setx see_mask_nozonechecks 1

typing it in the command prompt, or executing inside a batch file will create the environmental variable that Dasun mentioned, for the current user