Requirements
Windows 2000/XP/Vista
.Net Framework 3.5
Features
A Windows® Shell extension to unblock .EXE, .MSI and .ZIP files.
Easy to use, right-click any .EXE, .MSI or .ZIP file in Windows Explorer and click Unblock.
Works across network drives.
Select multiple files and Unblock.
Good for going through your downloads folder and unblocking downloaded files.
Screenshots
If you have verified that a program is not malware or a virus and want to get rid of the Open file warning message, then right-click -> Unblock to get rid of these messages.