Do you have the latest version of Adobe Reader (version 9.1) - if not uninstall all other version and install the latest one.
Alternatively you could try an alternative pdf reader, such as Foxit.
Qualcomm Snapdragon 835 benchmarks: Antutu, Geekbench 4, GFXBench and PCMark results
1995-2015: How technology has changed the world in 20 years
This stop-frame animation tells a moving story of domestic violence for Refuge
New iPad 2017 preview: Apple's affordable but underspecced new iPad may appeal to the education…
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.