We’re so sorry to hear it but not to worry! Here are a few alternate download locations:

Quick Installer Links (will download some more components while running)

http://www.archonsystems.com/Download/V2/inFlowInstaller.exe
http://download.cnet.com/inFlow-Inventory-Free-Edition/3000-2067_4-10772674.html

Full Installer Links (larger, but doesn’t need internet access while running)
http://www.archonsystems.com/Download/V2/inFlowInstaller_Offline.exe
https://cdn2.inflowinventory.com/Download/Installer/2.5.1/inFlowInstaller_Offline.exe

You can also try downloading using a download manager like:
http://www.freedownloadmanager.org/