Official drivers are only available for 32-bit (x86) systems, including Windows 7, Vista, XP, and 2000.
Run the installer or manually update via the Device Manager by selecting "Have Disk" and browsing to the downloaded .inf file. skachat draiver dlia lbp 1120
Which and bit version (32-bit or 64-bit) are you currently using? Laser Shot LBP1120 - Download drivers, software and manuals Official drivers are only available for 32-bit (x86)
However, please note that this printer is an older model with significant compatibility limitations: including Windows 7