Because 7 8 9.
It doesn't have windows.
The Logo.
It says "Hey Shrek, whats up?" (I was 9 when i made this okay)
I want to wear it to the science museum "In your closet, why " 9: DUH. To attract radioactive spiders!
Nobody has ever seen them directly, but everyone says they exist.
Hey Microsoft, why is there no Windows 9? You've given us 7 and 8, and now you're skipping straight to 10?" "Well, to be completely honest, 7 8 9."