Sometimes you want or have to use Windows. I know, it is not your fault but there is one application that you cannot really run under Linux. For example, some people want to use Linux to download file from p2p network but they need it under Windows later on. If you have to keep the PC connected to the internet 24h, it is better to run it on Linux.
Windows cannot access the Ubuntu ext3 filesystem by default but there is a nice application that wiil help you:
It works both with ext2 and ext3 file system. After installation, the ext2 or ext3 partinion will be visible under windows and available for reading. No writing support.
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