The 1993 Compaq Presario 425 All-in-One PC System is a vintage desktop computer that combines all the essential components into one compact unit. With its classic design and Windows 3.1 operating system, this system offers a unique glimpse into the technology of the past. As a part of the Presario series, known for its reliability and performance, this Compaq all-in-one PC is sure to appeal to collectors or users looking for a retro computing experience. everything working. See picture for original specs. Case has some yellowing due to age. See pictures for cosmetic details.