Older operating systems such as Windows NT 4.0 do not natively support USB. Others, such as Windows 95 OSR 2.1 has limited USB functionality but does contain generic modems drivers for USB. Therefore Windows NT 4.0 and Windows 95 don't support the USB operation of the AETA. See the Microsoft White Paper on USB support under Windows 95.
The installation procedure for newer Microsoft OS's is expected to be similar to the installation procedures for Windows XP or Windows 2000.