To edit a PDF in Windows, you can use the built-in Microsoft Edge browser to annotate a PDF with tools like highlighter, draw, add text, erase annotations, and add comments. Alternatively, you can convert your PDF into a Word document using Microsoft Word for more advanced editing capabilities such as inserting images, shapes, and drawings. For more advanced editing features, including password protection, you can use Adobe Acrobat Pro's free version or other free apps that offer similar tools. These tools allow you to edit directly on the web without downloading an app, making them a convenient option for occasional PDF editing needs.