The file x420xlu.dll is a piece of the SPL User-Mode Printer Driver for the Xerox WorkCentre Pro 420 XL from Xerox. This file allows the SPL (Print Spooling File) format to work with your printer. Printer drivers are applications that give your computer the information it needs to use a printer.
This driver works with the Xerox WorkCentre 415 and the Xerox WorkCentre Pro 420 XL. An error with the x420xlu dynamic link library may make it impossible to use your Xerox WorkCentre printer.
The most likely culprit for dll errors is the Windows registry. The registry tracks all the programs and parts of programs on your computer. If a file is moved and the registry isn’t updated, you will get an error. Fixing such errors can be like hunting for a needle in a grass field.
Rather than waste your time, run ZookaWare PC Cleaner. ZookaWare PC Cleaner will clean your registry by fixing all the errors and removing old entries. And ZookaWare PC Cleaner comes with a 100% guarantee.