windows doesn’t support linux file system( ext2,ext3 ), so my advice use linux file system just for operating system, places your data in another partition with format fat32, when you use windows you will never need linux operating system file, make linux file system is small (5 GB )
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as long as you are using ext2 (or ext3) you can download and install the necessary windoze program to be able to read the linux partitions. YOu can savely read ext3 from windoze, but writing is supported to ext2 – it is possible to write to ext3 as well, but there are risks – I haven’t needed to write to ext3, so I haven’t worried about such details.

generally windows doesn’t support linux file system( ext2,ext3 ), but you may be able access using some software like “ext2fs”. you can download it from the given link “http://www.fs-driver.org/download.html”