How has he deleted the history?
If he has just used Tools/Internet Options then there still maybe some left in Explorer. It may only be a cookie but there is a chance that there is some trace left.
Hands-on: Acer Predator Triton 700 review
D&AD Awards 2017: see the best design, advertising, illustration, animation and VR of the past year
How to lose weight with an Apple Watch
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.