Download link: https://www.microsoft.com/en-us/software-download/windows10
In case of an issue with activating your Windows key, please use one of the methods:
Method 1:
Download link: https://www.microsoft.com/en-us/software-download/windows10
Download the installation kit media creation tool 1809 on a bootable device like dvd or usb stick.
After Windows installation:
1. Go to “Settings”
2. Select “Update & Security”
3. Find “Activation”
4. Select “Activate” or “Change Product Key”
5. Insert the purchased key
6. Windows 10 Pro is operational
Method 2:
2. Choose the ”Activate by phone” option.
3. Click the drop-down menu, select your country, and then click ”Next”.
4. Call the Toll free number and follow instructions to generate confirmation ID to activate your Windows.
Method 3:
1. Press and hold “Windows” key and press “R” on your keyboard.
2. Type “SLUI 4” in the window that pops up and press enter.
3. Click the drop-down menu, select your country and then click Next.
4. Call the Toll free number and follow instructions to generate confirmation ID to activate your Windows.
More information regarding phone activation can be found here.