Before you start, ensure that the operating system version you’re running is Windows 10 or later. There is no way to install Office 2021 on Windows 8.1 or earlier.
Step 1: Download the zip file, right-click and then Extract the downloaded file to your computer.
Step 2: Open Install-x32.bat or Install-x64.bat to install Microsoft Office 2021 64-bit or 32-bit as you need.
If you only want to Install basic Office apps (Word, Excel, and Powerpoint) open Install-x64-basic.bat or Intel-x32-basic.bat instead.
Installing Microsoft Office 2021, this may take several minutes, depending on your internet speed.
Once the installation is completed, let's open any Office apps. As you can see, you need to activate the Office 2021 license.
Step 1: Type cmd in search box, right click on Command Prompt then select Run as administrator.
Step 2: Copy all below commands, right click to paste into cmd window at once then hit Enter.
if exist "C:\Program Files\Microsoft Office\Office16\ospp.vbs" cd /d "C:\Program Files\Microsoft Office\Office16"
if exist "C:\Program Files (x86)\Microsoft Office\Office16\ospp.vbs" cd /d "C:\Program Files (x86)\Microsoft Office\Office16"
for /f %x in ('dir /b ..\root\Licenses16\ProPlus2021VL_KMS*.xrm-ms') do cscript ospp.vbs /inslic:"..\root\Licenses16\%x"
cscript ospp.vbs /inpkey:FXYTK-NJJ8C-GB6DW-3DYQT-6F7TH
cscript ospp.vbs /sethst:kms.msgang.com
cscript ospp.vbs /act
pause
Microsoft Office 2021 is activated, and you can start using the applications without any restrictions or limitations.
Step 1: Right-click the Activator.bat file, then select Run as administrator (You can find it in the Office2021 zip file).
Finally, check the activation status of Microsoft Office 2021. Congratulations! The activation was completed successfully.
KMS credits: https://msgang.com