📦 Simplified installation on Windows:

1) Remove any non-LTSC Office software

2) Download the installation click here

3) Open the image by double-click. Then run INSTALL file and let installation finish

4) From “Start” run “Word”, go to “File” > “My account” > “Change a key” then redeem the key

If you don’t trust our installation disk image, you can follow the official Microsoft instruction for Office Pro Plus 2021 LTSC deployment:
https://learn.microsoft.com/en-us/deployoffice/ltsc2021/deploy