How to Get a Free Windows 8 Evaluation Copy Before Buying
To experience Windows 8 fully you might need to make some hardware changes too. whether you like it or not windows 8 is built around touch, therefore making it more useful and simple to use with a touch enabled device.
Before making the final decision whether to purchase or not, you might want to download a free copy, run it on your home pc and try it out to see. there some great advantages that come with it too, like speedy boot time, improved search, tiles-based interface and many other great improvements.
Get a 90 day evaluation
Go to msdn.microsoft.com and scroll to the bottom of the page, choose between the 32 or 64-bit version. You will need to log in with your microsoft account to download windows 8.
Note: The evaluation copy will expire after 90 days and cannot be upgraded. you might want to set up a dual boot or use a virtual machine.