I'm running Windows 10 on my laptop and it is activated with an OEM key, somehow my laptop got infected by bunch of viruses, tried everything but I guess formatting is the only option left. But I'm afraid that if I download an ISO windows 10 file and install it to my laptop, then the same key will not work or would it? The hardware will be same. So what can I do? Does reset do anything or brings everything back to default settings?