It provides Windows NT4.0/2000/XP with full access to Linux Ext2 volumes (read access and write access). This may be useful if you have installed both Windows and Linux as a dual boot environment on your computer.
The "Ext2 Installable File System for Windows" software is freeware.
Get it here http://www.fs-driver.org/
It works as it claims... comes with a Window's install and un-install program etc.