It does. It's the / sign. In fractions, / stands for divided by.
Durr, the button on the bottom left
Organize
They looked like this http://i1-news.softpedia-static.com/images/news2/From-Windows-95-to-Windows-Vista-SP1-RC1-0-The-Evolution-of-the-Start-Menu-Button-3.png
To change the background (or wallpaper) on a Windows Vista system you must first able yourself to change the desktop background. Then you can access it by clicking the Start button and clicking on the control button and searching for "appearance and personalization".
If you hold the "Alt" button while typing "171", it will give you ½
That edition of Windows Vista does not exist. Windows Vista exists in two editions for home users: Windows Vista Home Basic and Windows Vista Home Premium.
In a windows computer the start button is the button in the far left bottom corner of your main screen or desktop, in older versions of windows it had start written in it now with vista you will see an "orb" (a round button with the windows symbol in it) which says "start" when you hover over it.
No your windows 7 will not deleted
No. Obviously, if you upgrade to Windows Vista, you will have Windows Vista.
No.
command bar
Windows Vista is not an option for the iPhone.