People used it to "slipstream" drivers into Windows installation discs. You could open a Windows XP ISO, inject your own custom wallpapers and security patches, and save it.
The year was 1999. While the rest of the world was panicking about the Y2K bug, a developer named was looking at a different problem: the "physicality" of data. UltraISO
It became the gold standard for ripping rare software into a format that would last forever, bypass basic copy protections, and fit onto the emerging USB flash drives. The "Bootable" Revolution People used it to "slipstream" drivers into Windows
The software’s "killer app" was its . The top half showed your local hard drive, and the bottom half showed the internal guts of an ISO file. You could drag a file from your desktop and drop it directly into the "disc image." It felt like magic—you were changing a permanent object before it even existed. The Golden Age of Customization While the rest of the world was panicking