Ad from the late 70s and early ’80s

Current Windows logo 

The new logo

(Fox News) – Microsoft on Thursday announced what it called the first update
to the company’s logo in 25 years, a revamp that takes the familiar colored
banner and turns it into … well, more of a window. Rather than a colored
banner, the new logo is a colored square composed of four evenly sized
squares and a tweaked typeface.

It’s one of many changes the company is making in anticipation of the
Windows 8 launch later this year, said Jeff Meisner, a spokesperson
for Microsoft. 

Jeff Meisner