"You’re not taking this seriously, Lena."
After installation, open Word > File > Account. You should see “Microsoft Office Professional Plus 2019” and “Product Activated.” en-office-2019.iso
Always verify the digital signature of any setup.exe inside an ISO. Microsoft’s signed executables will show “Microsoft Corporation” in the Digital Signatures tab. If it’s missing or invalid, do not run it. Stay safe. "You’re not taking this seriously, Lena