| Software | Why It’s Better | | :--- | :--- | | (current version) | Official, regularly updated, includes cloud & mobile sync. | | Foxit PDF Reader | Lightweight, fast, strong security focus. | | SumatraPDF | Extremely lightweight, open-source, no bloatware. | | Okular | Cross-platform, highly customizable. | Final Verdict Only download Adobe Reader XI 11.0.23 if you have a specific, offline-only need —for example, running it on an air-gapped Windows 7 machine to access archived PDFs that a modern reader corrupts. For everyday use on a connected PC, installing this software poses a serious security risk to your system and data.