| Software | Compatibility | Notes | |----------|--------------|-------| | (older versions) | Works on Windows 7 | Last v10.x supports Win7; no security updates for Win7 after 2022. | | SumatraPDF | Works on Windows 7 | Lightweight, open-source, minimal features, still updated? (Check latest version—some recent updates may drop Win7). | | MuPDF | Works on Windows 7 | Very basic, command-line friendly. | | Web-based PDF viewers (e.g., Google Drive, Microsoft Edge on Win7?) | Limited | Uploading sensitive documents to cloud may violate policies. |