: The most popular open-source alternative; completely free and highly powerful.

: Free versions of Office apps are available on iOS and Android for devices with screens smaller than 10.1 inches.

: Since Microsoft no longer patches 2010, even a "clean" installation is a security risk to your PC.

: Without a valid retail product key, the software will enter "Reduced Functionality Mode," where you can view documents but not edit them. 📦 How to Reinstall (If you own a key)