Processor: 1 GHz Pentium|| Memory: 512 Mb of RAM|| Free disk space: 500 MB|| * For use Aiseesoft Free PDF Viewer need a minimum: Aiseesoft Free PDF Viewer - system requirementsĪiseesoft Free PDF Viewer works with Windows operating systems - Windows 7 / Windows 8 / Windows 8.1 / Windows 10 - works very well with Windows 10 and Windows 8.1.