I have a macbook pro. It only contains windows 7 and no Mac os and now i want to upgrade to windows 8. How to do it?

You have to buy it, it isn't a free upgrade

The official or unofficial way? Officially, you could call apple and get the right Mac disks sent to you so you could reinstall OSX then use boot camp assistant to install windows. If you never use OSX, you could get away with a leaving a 25-30gb partition for OSX leaving the rest for windows.

Unofficially, I think you could just insert the CD in the drive and boot from it like a windows machine to install 8 over 7.

Shah212 wrote:

yeah i know. i have the original windows 8 with me but i don't how to install it on my macbook pro because theres no mac os on it.earlier i has mac os so i used bootcamp through it and intalled windows 7. Now theres no mac so am wondering how to install windows 8 on it ?

You now have a Windows machine, so just put the disc in and install 8, nothing different from any other Windows machines.

You'll have to get them yourself, one of the disadvantages of running Windows on a Mac without Boot Camp I am afraid.

After you upgrade you will know which drivers don't work and you can search for them.

find your machine here and DL/install these drivers immediately after you complete the initial w8 setup

http://support.apple.com/kb/ht5634

i don't recommend what you might do but is doable