It provides Windows NT4.0/2000/XP/Vista/7/8/8.1/Server 2003/2008/2008 R2/2012/2012 R2 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.