Having now used this laptop every day for three months, I'm sorry to report that I'm very disappointed with it.
It has a series of minor but irritating faults that NO amount of tweaking or driver updates will correct.
For a $1000+ laptop this is simply unacceptable. I'm also using an old Toshiba laptop that's never shown any of these faults after 4 years service. In hindsight I regret purchasing this DELL and will be replacing it with another brand after its (useless?) warranty expires.