When you attempt to download an executable file on Windows (e.g., an .exe or .msi file) you may see a Firefox Downloads window with one of these error messages under the filename:
* Blocked: Download may contain a virus or spyware.
* This download has been blocked by your Security Zone Policy.
You may experience this problem if the Windows option for Launching applications and unsafe files is disabled. To fix this:
1. Right-click the Internet Explorer icon on the desktop.
2. Select Properties. The "Internet Properties" window will open.
3. Select the Security tab.
4. Select the Internet zone and click the Custom level... button.
5. Scroll down to the option, Launching applications and unsafe files (under "Miscellaneous").
6. Select Prompt (Recommended).
7. Click the OK button.
