Windows 7 has a different kind of network activity icon in the system tray and unlike the Windows XP style network icon which blinks, the Windows 7 default icon does not show any activity. Network Activity Indicator is a freeware tool which displays the old ‘two monitors’ icon in Windows 7 that flashed blue to show network activity on the System Tray.
Unlike the original Windows XP utility (that has individual indicators for each interface), this program indicates outgoing and incoming network packets on all available interfaces. You can configure the blink rate of the icons in the system tray.
This utility is a standalone executable. Run the program, you’ll see a new system tray icon. If you want to remove the default Windows 7 network utility, then open the notification center in control panel and select “Hide icon and notifications” for the default Windows 7 network icon.