This usually happens on Windows after a major update.
Don’t use generic drivers or third-party driver updaters. Always stick with Canon’s official files.
Double-click the downloaded .exe file. It will extract into a new folder. Open that folder and double-click Setup.exe .
Linux 32-bit and 64-bit systems (UFR II/UFRII LT printer driver). Step-by-Step Driver Installation Guide
Despite the different names, the internal printing engine is virtually identical. In most cases, the driver for the LBP6030w will work perfectly for the LBP6018w, and vice versa.