A Netbook factory installed Linux system, it means that Microsoft will fall between the two stoves in OS and office, at most just increase the pirate users, but more to Microsoft panic is that many people on the Internet have said, "If you use Linux for a month, Then you will become a loyal user of Linux!!" If so, it also means a bigger storm, people may change their home or work computers to Linux, the effect of this replacement, will be the biggest threat.