Reinstalling using key

LiamJames

Honorable
Nov 7, 2013
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I'm currently going to build a new computer and when I heard that using your old HDD to boot is more hassle than its worth, I was wondering how would I boot it up without the disk when I get a new HDD? I have the Windows 7 key but will I run into any problems? I'm thinking of getting a new HDD and using it to boot, then add the old HDD.

Edit: The parts I will be getting are Nvidia and Intel like my old ones so would that be fine?
 


I think he meant the old HDD, with the original Windows install. Yes, that would be a major pain.