Both Windows and Linux use different formats for their filesystems. Windows uses NTFS and Linux uses EXT 2/3. While it is possible for Linux to read/write NTFS format using NTFS-3G driver, reading/writing files the other way round has always been an issue for Windows users.
Ext2 Installable File System (IFS)For Windows provides a solution to this. It allows Windows users full access to Linux Ext2 volumes (both read and write) and best of all, it is free.
The Ext2 IFS software installs a pure kernel mode file system driver Ext2fs.sys, which actually extends the Windows system to include the Ext2 file system. The Ext 2 volumes are mounted and assigned drive letters. All applications can access directly to Ext2 volumes and users can transfer files to and from the Ext 2 volumes via the Window Explorer.
If your Linux system uses Ext3 format, it will be mounted as a Ext2 drive, without any loss of functionality.