Downloading "activators" or "cracks" from untrusted sources is a primary way computers are infected with malware, ransomware, or spyware.
A simple batch file to activate Microsoft Office 2016 · GitHub microsoft-office-2016-product-key-crack-download
Microsoft may detect unofficial keys and disable features or mark the software as "non-genuine," resulting in persistent pop-ups. Official Ways to Use Office microsoft-office-2016-product-key-crack-download