Frutiger Aero

Frutiger Aero, also called Web 2.0 Gloss, is a user interface design style and Internet aesthetic based on Windows Aero. The name of the style derives from the name of Adrian Frutiger, a Swiss typeface designer who was responsible for many of the humanist typefaces that were often used in older computing interfaces.

https://en.wikipedia.org/wiki/Frutiger_Aero