Windows 95 was released on August 24th, 1995. Jay Leno helped launch the software alongside Microsoft co-founder Bill Gates, with a lot of jokes and the appearance of the entire Windows 95 development team on stage. It was a huge day for Microsoft with TV commercials blasting the Rolling Stones’ "Start Me Up" with images of the new Start button that we still (just about) use today. Microsoft even hired Jennifer Anniston and Matthew Perry to create an hour-long cyber sitcom all about Windows 95, and the software was so popular that 7 million copies were sold during the first five weeks.
Source: The Verge