Can windows 8 and windows 7 run together
Windows 8 and Windows 7 can run together. You need to backup all your data before you being the process. You need to create a new partition for Windows 8 and install it on that partition. On the steps to follow, go to http://lifehacker.com/5840387/how-to-dual+boot-windows-7-and-windows-8-side-by-side.
a little, but window 8 do got a window 7 on desk top, window 8 loads faster than window 7, window 8 do touch screen if you set it up
No. Windows 8 doesn't trust windows 7. Because seven ate nine
Yes, you can partition your HDD and do dual boot.