Disable "Open File - Security Warning" Message

1. Type intercpl.cpl in start menu search box or run and press enter.
   

2. Select the Security tab.
   

    

3. Click Custom Level…

4. Select Enable (not secure) under Launching applications and unsafe files.
   

5. Click OK.

6. Click Yes.
   

7. Click OK.

To disable the Your current security settings put your computer at risk message in Internet Explorer, check this link.