I can confirm that I am also facing the same issue from yesterday.
A couple of drivers (recommended by DELL Update) got updated yesterday, after which I am facing the challenge. It might have caused the issue, I feel.
Edit: These are the drivers updated yesterday
- Alienware Command Center Application - A00 - 894.23 MB - Recommended
- Alienware OC Controls Application - A00 - 86.48 MB - Recommended
Think Location