question is why? 8 is a far superior operating system, give it a chance - just think, your phone and tablet dont have that prehistoric text menu anywhere and there just fine! oh and dont use those stupid start menu applications there garbage, some even brick the install
on the other hand what no one will tell you and what most people dont know, most Windows 8 computer sold by the big companies (ASUS Dell HP etc) have SLIC (bios) flags for Windows 7 meaning you can install Windows 7 and with the right method will activate natively (no cracks, absolute genuine, same activation method as ASUS Dell HP etc use) - Google is your friend