Pros: Windows 7 64bit recognized the device right away and was able to send a fax.

Cons: Have tried both Windows driver and download from StarTech and not been able to get dialing sounds or caller ID, but have been able to send a fax.

Other Thoughts: Still using basic Windows Fax and Scan software.

Pros: Small, not expensive, and it works fine through a USB 2 port on XP, Vista and Win8.

Cons: None so far.

Other Thoughts: StarTech USB56KEM3 External V.92 56K USB Fax Modem:
Mine works well with my HP Sleekbook w/Win8(64). It DOES need to be attached to a USB 2 port, NOT a USB 3. Then configure your modem connection to your dial-up service and setup your Win8 network.
It is a little awkward since Win8 was not designed to be modem friendly but with patience and understanding it can work fine.
It also works great on my WinXP and Vista machines, although they both have internal modems and don't need it.
You can download the latest data sheet and drivers from
StarTech. If you have any installation questions, their email response is fast and in my case effective.

Note that your modem will not be graphically displayed in
the Win8 Task Manager.

Pros: Works well on Windows Server 2008 R2 (even as a Fax Server), inexpensive, no need to open computer as with a fax card installation.

Cons: My only issue was that it was advertised as working with Win7 and Win Server 2008 R2, but the install process doesn't offer either as a choice and the instructions don't tell you how to do it. I ignored the documented install process and went into the install CD and executed setup here: "..\Windows7\x64\setup.exe". This worked well and I had the fax working in short order. In another 10 minutes, I had it also running as a Fax Server for the other PC's on my little network.

Other Thoughts: The only real problem I experienced is not the fault of the Fax Modem, but worth mentioning. It seemed to be sending faxes when the other end hadn't even answered the call! I struggled with this for hours until finally realizing that a traditional fax machine (Brother MFC-7840 "All in One") was also on that same phone line in another room, and it had a feature that would "auto-answer" if it saw an extension go "off hook". So, every outbound fax was actually being received by that machine! I was able to change the settings on the Brother to "Receive Mode: Manual" (this option might not have been needed) and "Easy Receive: Off" (this was necessary). Now, all is perfect.