: Insert your Office 2007 CD into your computer's drive and run SETUP.EXE if it doesn't start automatically.
is completely free. You can go to [Office.com], log in with a Microsoft account, and use web-based versions of Word and Excel. They look similar to the modern Office, save your files to the cloud, and are completely secure.
If you still have the original installation CD or DVD and your computer has a disc drive, you are in luck. This is the safest way to install the software. Simply insert the disc, follow the prompts, and enter your 25-character product key when prompted.
Digital note-taking application deployed for academic organization. How to Safe-Keep and Reinstall Legacy Office 2007