The versions are constantly changing, so look in the related link below for the latest information.
The current Linux kernel version is 3.9.
There is no such thing as "Windows Linux." Linux is not a version of Windows and has nothing at all to do with Windows. They are two totally completely different operating systems made by completely different people.
There is no Linux version of Adobe Fireworks. However, you can run the Windows version on Linux if you have Wine installed.
There is no native version for Linux. The Windows version runs moderately well when using Wine.
the latest stable version is 3.4.4
You can install Windows or any of several Linux distributions. If its more than a few years old I'd recommend Linux as the current Windows version won't run reliably on it as it probably doesn't have enough RAM.
ten or more years of development depending on your version of Ubuntu. Ubuntu is a modern Linux distribution while windows 95 is an aging and unsupported parent of the current windows environment.
Yes. There is a Linux port of Virtualbox and it runs Windows as well as any version of VB.
Linux.
It uses Silverlight. A lot of windows computers don't have the current version of Silverlight. If you are using linux, the mimic moonlight won't run it.
All versions of the Linux kernel are "full featured." The latest stable version of the Linux kernel as of May 17, 2011 is 2.6.38.6.
Format the hard drive, install another version of Windows, or a Linux distribution.