How do i get a free driver registry key

I'm not sure that's possible. However if you buy Windows you get thousands of registry keys and some of them are based on your drivers. Go to the start button, then to run and type in regedit this will show you all of your registry keys. I wouldn't change anything in this window until you know what each key is doing as this is your registry and it controls everything about your windows setup. I'm assuming that you have a piece of hardware that isn't working and need a driver. You'll have to resubmit your question but when you do we'll have to know the manufacturer, model, etc. as it's written on the hardware. If you got a disk with it the drivers are on the disk.