Recently Microsoft releases its new Operating system Windows 7. During the previous press interview when the reporter asked about the google trying to build their own operating system, the management consider it as light and they think they cant compete with their strength in the market. Its no wonder they are very confident in their market strength that google cant take over it. But there is a silent competitor which occupies the market. The name is UBUNTU linux based operating system. Many big companies, Government offices are using this OS, as this is a open source OS. Previously there are many software is not compatible with Ubuntu but the latest version 9.10 clarifies all. Even it comes with firefox browser and many manufacturer are offering ubuntu as another OS. Also hacking is not possible in this as windows which makes it reliable to government offices.