I. Windows 7

1. Step 1: Remove previous license key then replace a new one

Go to “start” then type CMD in searching box, hit enter.

Type slmgr /upk to remove the previous license key.

Type  slmgr /ipk + key to insert the new key which I gave you.

EX: slmgr /ipk FB9V4-98V76-2YW3R-7M2MP-86BYE

Wait about 3 minutes, you will see a notification like this

2. Step 2: Activate

On the CMD.exe windows, continue to enter comment slui 4

Choose United State country

After that, a new windows appear, you will see this instruction from Windows 7

This is a free call service so it won’t cost you any thing. If you are an international customer, I recommend you to use these following service to make a free call:

• Textnow.
• Skype.

Buyers please note:

• The phones system may ask you how many computers you register for the copy of Windows?  just answer 1.
• Sometimes the voice call system can not realize your Installation ID because they have not updated all data. In this case,  just contact me to send me 9 groups of your installation ID, I will give to you the confirmation ID from block A to H within 24 hours.

Thanks for your cooperation!

II. Windows 10

+ Search for the Command Prompt

+ Run it as Administrator

+ Type this code to remove the old key: slmgr.vbs /upk

+ Next step, command this code to insert your new key to Windows 10: slmgr.vbs /ipk Your Key

+ Type slui 4 then hit enter

+ Click on “Next” button and see the following instruction from Microsoft.

+ This is a free call service so it won’t cost you any thing. If you are an international customer, I recommend you to use these following service to make a free call:

• Textnow.
• Skype.

Buyers please note:

• The phones system may ask you how many computers you register for the copy of Windows?  just answer 1.
• Sometimes the voice call system can not realize your Installation ID because they have not updated all data or if you can not make a call,  just give me 9 groups of your installation ID, I will give to you the confirmation ID from block A to H within 24 hours.

Good luck!!!