If you have an internet connection, Microsoft offers . You can use Word, Excel, and PowerPoint directly in your web browser for free. All you need is a Microsoft account (like an Outlook or Hotmail email). It lacks the full offline capabilities of the 2019 suite, but for basic tasks, it is perfect.
If you are working with massive Excel spreadsheets (over 2GB) or high-resolution video in PowerPoint, the 64-bit version is essential. It utilizes your computer's memory more efficiently, preventing crashes during heavy tasks.