Run the installer or manually update via the Device Manager by selecting "Have Disk" and browsing to the downloaded .inf file.

Official drivers for the can be downloaded directly from the Canon Europe Support Page .

Which and bit version (32-bit or 64-bit) are you currently using? Laser Shot LBP1120 - Download drivers, software and manuals

Some users successfully run the printer by installing a 32-bit version of Windows 7 or XP within a VirtualBox environment and passing the USB connection to the virtual system.

However, please note that this printer is an older model with significant compatibility limitations:

Some communities suggest trying to force-install the Windows 7 32-bit driver manually through "Add a Printer" > "The printer I want isn't listed" > "Add a local printer," though this rarely works on 64-bit architecture.