Do i use a clean install if i am going to downgrade to windows 7?

[jamesgz]

I am getting my laptop in Christmas for gaming. Unfortunately, it has a windows 8 on it which is not compatible for many games ( Shogun 2, Left 4 dead 2, dead island, crysis 2.....)
Should i buy a Windows 7 DVD or a windows 7 key ?
How do i downgrade it from windows 8 to windows 7 ?
Should i do a clean install?
How do i do a clean install?

 

[ex_bubblehead]

You already have a thread running for this. Don't multi-post.

 

[Ramzzz2936]

the games work same as win7 there arent any problems anything which works on win 7 will work on win8 ofcourse exept drivers