I think it very likely your choice of 'ad-hoc' is wrong. If you are connecting your 2nd laptop to the Router you should select 'infra-structure'. You should only use the Windows WiFi manager and uninstall the Dell WiFi Manager. Should then work!
Dell XPS 13 9370 (2018) review
No need to scan sketches into your computer with Moleskine's new smart pen
Streaming : Netflix ou Amazon Prime Video ?