The E56K V90 Modem is a type of internal or external dial-up modem that supports the V90 standard for connecting to the internet via a telephone line. The "E56K" refers to a modem that can theoretically support speeds of up to 56Kbps (56 kilobits per second) over standard telephone lines, while "V90" is the ITU-T standard for 56Kbps modems, which was popular in the late 1990s and early 2000s.

The Windows driver for this modem is software that allows the modem to work with a computer running Windows. When you install the driver, it enables Windows to communicate with the modem hardware and allows you to use it for tasks like dial-up internet, faxing, or other modem-based communications.