If I remember correctly F8 is safe mode on most systems, try tapping DEL as system boots or it should tell you as it boots something like "Press ? to enter system setup"
Surface Pro 5 News - release date, UK price, features, specs
Gear VR vs. Daydream: Which delivers the best VR experience?
iPad Pro 12.9 vs Surface Pro 5
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.