I ask this because Windows 10 has Word set up where you have to reconnect every 30 days or it stops working.
If I buy a new computer…
Then just install a good operating system such as Linux. Most common Linux distros include LibreOffice and install it by default. So, you will be able to immediately start working.
LibreOffice is a Free and Open Source Software (FOSS) where Free should be understood as meaning “liberty”. There is no electronic activation or periodic licence renewal.
Install it and use it as you like. No need for network connection. It works offline.
To be fully independent, don’t forget to install the “built-in” help if the installer doesn’t do it by default.
To show the community your question has been answered, click the ✓ next to the correct answer, and “upvote” by clicking on the ^ arrow of any helpful answers. These are the mechanisms for communicating the quality of the Q&A on this site. Thanks!
In case you need clarification, edit your question (not an answer) or comment the relevant answer.