Try booting the "Last Known Good Configuration".
Immediately after powering on, tap the "F8" key until the Boot Menu is displayed and select the option for the "Last Known Good Configuration".
What is ransomware and how do I protect my PC from WannaCry?
What I learned from my mentor, Oscar-winning VFX supervisor Phil Tippett
Siri vs Google Assistant
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.