WinFax PRO and Windows Server 2003/Windows Server 2008
One of the main components of WinFax PRO is its printer driver, the printer driver allows you to fax from other applications. Without this driver, you cannot send faxes from other applications. WinFax PRO is crippled without the installation of the included printer (WinFax) driver, without it, all you can fax are single cover pages that are built into WinFax.
Windows Server 2003
The first problem with installation of WinFax PRO under Windows 2003 is that the printer driver support in the operating system was moved from kernel to user mode. The reason is that the use of kernel mode printer drivers can possibily cause a server to hang, result in a blue screen and require a reboot. This isn’t something you want happening on a server. Because of this possibility, Microsoft decided to block the installation of all kernel mode printer drivers in Windows 2003. During the installation of WinFax PRO, a kernel mode printer driver (also called version 2 printer driver) is added to your list of installed printers. By default, Windows 2003 won’t allow you to add this printer, and during the installation it is either ignored silently or a printer driver related error message is displayed. Fortunately, in Windows 2003 you can bypass this restriction. You can set a group policy in Windows 2003 to allow the installation of kernel mode printers. Once you’ve done this, you should be able to successfully install WinFax PRO under Windows 2003.
Windows Server 2008
Windows Server 2008 does not support Type 2/Kernel Mode printer drivers. While the installation of WinFax (may) appear to complete under Windows 2008, the installation will not include these printer drivers. WinFax PRO is not compatible with this operating system.