Any way to lock a key from being used?

[CamCracker]

Long story short, my ex girlfriend got a netbook a few years ago, and it came with windows 7 starter. I gave her a copy of my valid Windows 7 Home Premium keys and taught her how to reinstall Windows 7 on a USB drive. So now she has the netbook with windows 7 on it, and she upgraded to a new 15 inch HP Envy, she doesn't use the netbook anymore. And since we don't talk anymore, any attempt to ask if I can have the key back and she reinstall the old system on there from the recovery partition, it's all gone unanswered.

I just want to have my windows 7 Home premium key back, she isn't using the netbook and I need it to install now.

What I'm wondering is if I can just install windows 7 on my laptop, and then activate it, I know it will deactivate the netbook, but can I lock the key to my computer only so if she or anyone else tried to reactivate it, it wouldn't let them and it wouldn't affect my computer?

I just want my key back and she isn't using it anymore, she just blocked me on facebook today because I contacted her about it. So I'm done with trying to work with her and I just want to get this over with.

I just want to lock the key to my computer only.

Then if I ever needed to reinstall the product key on another computer, could I repeat the same steps to lock it to that computer so she can't use it?

I'm not trying to be mean to her. She isn't using the computer. She got a new one.

 

[NoelDP]

The only way to block a Key is to report it as stolen to MS - they will then permanently block the Key from ever being used, and any current installations will eventually fail validation.
The snag here is that you will be unable to use the Key yourself - and I don't think that MS will issue a replacement Key for free.
Call your local Activation Center for advice. - How to contact a Microsoft Product Activation Center by telephone