SEATTLE (Reuters) - Bought the latest whiz-bang personal computer, but don't know what to do with your older, fully functional PC? One option would be to try breathing new life into it with Linux (news - web sites), the software standard that is presenting itself as an alternative to Microsoft Corp.'s (NasdaqNM:MSFT - news) Windows operating system. With better stability, security and pricing in a desktop operating system with a look-and-feel similar to Windows, Linux advocates say they are getting ready to take on Microsoft, which dominates the desktop market. Since Linux is free to be copied and modified, unlike...