Hi there, my name is ***** ***** I will be assisting you today.
If you used a pirated key off the internet and activated it as a corporate or enterprise version you're probably going to have to re-load windows because you can't activate Enterprise/Corporate versions with consumer keys. The key you are trying to use must match the version of windows installed exactly... meaning 64/32 bit, same edition, etc...
I'm betting that's what happened.
You can try using the Pro disc to install Windows 10 pro over the top of the Home version that's already installed. You might be able to save your files that way or at least reduce the amount of time you have to spend reloading apps and info. Otherwise you're going to have to pull your important files off and reload the system entirely. I would be very careful of trying to "force" a change in editions via registry changes or other net-described hacks because you could very well end up invalidating the new key.
I have no reason to believe you've invalidated the key. Keys only get invalidated after multiple activation attempts on multiple potential systems. So you may have tried to use the new key on this system a few times... that's fine, not really a problem. The danger you get into is if say you find a utility that forces or fools Windows into thinking it's a different version, then activate again... if it works you may be fine until Microsoft rolls out a patch or something which may trigger you having to do it again, etc... that's where you can get yourself into trouble because on microsoft's end it may look like the key is being used on multiple systems and may be flagged for invalidation. To be honest, no one really knows the exact parameters they use (because they obviously don't want people figuring out a way around it).
The other possibility is you could try to do a telephone activation. You don't need to tell them you used a pirated key or anything like that, and there's no way they would know. You might be able to activate it that way. Usually it's a voice-response system... but after you blow it a few times usually someone comes on who you can actually talk to. They may well tell you that you can't activate it and will have to reinstall as well. It's not an uncommon mistake so don't worry about "getting in trouble" or anything like that.In short, I wouldn't worry about buying another key. If you have a pro disc and a pro key, just install over the top and be done with it.
Indeed. I can't reload an OS remotely.