Have you tried starting in safe mode,Just keep tapping F8 as the computer starts.And if it lets you in try last good configuration or a system restore.
Also check device manager to see if any yellow exclamation marks beside any of the devices.
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.