The original UMAX driver installer is a 32-bit application. If you are running a 64-bit version of Windows 10 (which most modern PCs use), the original setup file will fail to execute normally.
Windows will apply the generic driver wrapper. Your scanner will now be recognized by native tools like Windows Fax and Scan or the Windows Scan app available for free in the Microsoft Store. umax usc 5800 scanner driver for windows 10 free download
If Windows 10 refuses to install the driver because of the signature, you may need to restart Windows in "Disable driver signature enforcement" mode (accessed via Settings > Update & Security > Recovery > Advanced Startup > Restart Now > Troubleshoot > Advanced Options > Startup Settings > Restart > Press 7 ). Final Notes on UMAX USC 5800 Scanners The original UMAX driver installer is a 32-bit application