Blue rooms can often give off cold vibes. Expert Sarah Bilotta is on hand to offer tips on how to choose a wallpaper that will make the room feel warmer.

All of them were blue by coincidence, according to a blog post by Mr. Chen. The change to a black screen comes in the wake of last year’s outage generated by the cybersecurity company CrowdStrike.

If you're not a fan of Microsoft's new default wallpaper -- a blooming, abstract flower shape that pays homage to Windows 10's royal blue colors -- you can change it up. Windows 11 has other ...