Windows XP Virus Edition (WXPVE) is one of the first versions of Windows XP, released in 2004. It was name like this because it had major problems with infecting itself with viruses. Due to this problem, it won't even get pass the startup screen.
Due to it being a very good operating system, Microsoft decided to make it free. However, since it was so unpopular, an archive of it cannot be found so it can't be downloaded anymore. Also, not much information is known about it.