Ok, so I have a Lenovo desktop pc and I’m making upgrades to it to make it more of a gaming pc. Im a adding a new motherboard and CPU. I will be using some parts of this Lenovo and I will use the new parts that I get to build a better pc. Im going to be keeping the Lenovo HD(hard drive) and im wondering if I can just use the Operating system that is already installed on the hard drive.
Is there anyway I can do this or do I have to buy a whole new copy of windows?