Did you recently install/uninstall something? Try reinstalling/uninstalling the 'suspect' program. Also, you could try a System restore to a point before you had the problem (but don't try this unless somebody else confirms it as well!).
Samsung Galaxy S8 review
1995-2015: How technology has changed the world in 20 years
This poetic animation about monsters is illustrated in a Van Gogh painterly style
Apple predictions 2017
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.