Introduction: A Classic Scanner Meets a Modern OS The Umax Astra 4100 was a popular flatbed scanner in the early 2000s, known for its respectable 1200 x 2400 dpi optical resolution, 48-bit color depth, and USB 1.1 connectivity. However, like many peripherals from that era, it faced obsolescence when Microsoft released Windows 10. Umax (now part of Pacific Image Electronics ) stopped providing official drivers after Windows XP.