Windows 10: How to confirm the validity of activation key before use it

I purchased an activation key for windows 10 pro, is there any tool can help me to verify the publisher of the key?

:)

 

Cannot activate windows 10 with VALID key, getting error 0x8007007B

Hello,

We realize the inconvenience you have experienced.

• Which Windows 10 edition installed on your computer?
• Which Windows edition product key are you using?

If you get an error code 0x8007007B, while activating windows 10, then any of the below one is true.

• You might see this error if you entered a product key for the Enterprise edition of Windows to activate
  Windows 10 Home or
  Windows 10 Pro. Try entering a product key that matches the edition of Windows on your device.
• You might see this error if you're trying to activate your work PC but aren't connected to your workplace's network. If you're connected to your work network and still see this error, you might need to change your network settings. Contact your organization's
  support person for more info.

[*]If your organization doesn't have a support person, you might need to enter your product key again. Follow these steps:

• • Select the Start button, then select Settings >
    Update & security > Activation.
  • Select Change product key, and then type your 25-character product key.

You might be asked for an admin password or to confirm your choice.

If it doesn't help, please follow the below furnished steps to activate windows through phone and see if it helps:

[*]

* Open run command by pressing Windows + R and type “slui 4”(without quotes) and hit enter.

* Select the country/region from the drop down menu, and then click
Next .

* Dial toll free number provided there and follow the instructions from the telephone system and write down the confirmation ID.

* Enter the confirmation ID numbers into fields A through H, in the same sequence as the telephone system provided them. When done, click
Activate.

* You can see the confirmation pop-up message on successful activation.

Keep posted if you require further assistance.

 

Ist the genuine validation page down?

Thanks for getting back to us.

You have received the same error since the website itself for validating product key is no longer available. We'd like to confirm if you have tried any troubleshooting steps to activate your Windows 7?

To activate Windows 7 using an Internet connection, please follow the steps below:

1. Select the Start button, right-click Computer, select
   Properties, and then select Activate Windows now.
2. If Windows detects an Internet connection, select Activate Windows online now.
   You might be asked for an admin password or to confirm your choice.
3. Type your Windows 7 product key when prompted, select Next, and then follow the instructions.

To activate Windows 7 by phone:

1. Select the Start button, right-click Computer, select
   Properties, and then select Activate Windows now.
2. Choose Show me other ways to activate.
3. Type your Windows 7 product key, and then select Next.
   
4. Select Use the automated phone system.You may be asked for an admin password or to confirm your choice.
5. Select your location (or the location nearest you) from the drop-down list, and then select
   Next.
6. Call one of the available phone numbers listed. An automated system will guide you through the activation process.
   

Update us with results for further assistance.

 

Ist the genuine validation page down?

I tried to activate windovs over internet, but it send me to page that is unavailable

https://www.microsoft.com/genuine/v...nuineInfo=C004F200&Channel=1&ErrCode=C004F200