T38 Fax Modem emulator for use with windows 7/8/8.1 and Server 2008/2012/R2 systems from the t38modem project, a complete version that runs as 64bit service and a full configuration program. You only need a SIP/VOIP account on a service provider and without any hardware you can send and receive fax on your voip number You install this program and then configure your Microsoft Fax with the installed modem and begin to send/receive FAX from your VOIP number.
BEWARE !
It could be a coincidence but I was hijacked for the first time ever after installing this product as soon as I got it successfully to register with my SIP provider.
Lost access to start menu - fortunately has windows open that allowed me to browse to C:\windows\system32\rstrui.exe (Windows restore) and knew that else I'd have been really messed up. Norton's antivirus definition were completely wiped and had to be downloaded again. Thank goodness I had Malwarebytes to clear it else who knows...