If you have up-dated your virus software then it may not be a virus.
If you have installed new software and the freezing started after the install, then it may be the new software that is causing the problem?
Samsung Galaxy S8 review
1995-2015: How technology has changed the world in 20 years
This 2D animation about monsters is illustrated in a Van Gogh painterly style
How to get WWDC 2017 tickets
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.