Windows 10: My windows activation key just stopped working and now I can't put in a new one

My windows activation key just stopped working and now I can't put in a new one.I've tried to put in a new key but it comes up with this - Any solutions?

:)

 

activate windows 7 oem key

There is no difference between the OEM disc and the Retail disc with Windows 7. A retail disc will accept a OEM or Retail key, and vise versa.

If the OEM Key wasn't going to work with the disc you have, it would have stopped you during the install when it first asked you for the key, not during activation.

What is likely the problem is that, since the OEM version has already been activated once, it is failing activation again. Activate it over the phone using the option given to you on the failed activation screen, and you shouldn't have a problem activating it.

 

activate windows 7 oem key

Well it didn't stop me because I told the installation program to activate the key later, so I didn't put any key during the installation. Maybe can it work if I put the key when it asks me in the installation?

 

activate windows 7 oem key

Win7 and Vista. It did not work with XP, OEM and Retail discs were different for XP(and anything pre-XP).

If it is already installed, you can enter it when you activate.

Is it saying the key is not valid or is it failing activation? A screen shot of the error it is giving you would help a lot.