File download stops at 20mb or 51mb on 100+mb files (IIS)

On IIS The CGITimeout property specifies the timeout (in seconds) for CGI applications. A solution provided by ejd:

Instructions:

1. Start a command prompt
2. Go to C:\Inetpub\AdminScripts
3. Then run the command: cscript.exe adsutil.vbs set w3svc/cgitimeout 10800